Color Legend:
Blue: Y-DNA Tested (haplogroup shown) or good candidate
Red: Candidate, not tested
Orange: Potential candidate

• Roelof Jans ` [26493] (1590-) M ✶ Kolderveen, Drenthe, Neth.
  • Hendrick Roelofs ` [26489] (1645-) M
    • Private [26491] M
    • Roelof Hendriks ` [26492] (1678-) M
    • Harmen Hendrix ` [3216] (1667-) M
      • Roelof Herms ` [3214] (1686-) M ✶ Zwartsluis, Overijssel, Neth.
        • Pieter Roelofs ` [104] (1718-1803) M ✶ Kolderveen, Drenthe, Neth. ✝ Oosterzee, Friesland, Neth.
          • Hendrik Pieters ` [1380] (1748-1753) M
          • Wouter Pieters ` [1382] (1758-) M
          • Hendrick Pieters Slump [720] (1755-1814) M ✶ Giethoorn, Overijssel, Neth. ✝ Echten, Friesland, Neth.
          • Roelof Pieters Slump [717] (1743-1814) M ✶ Giethoorn, Overijssel, Neth. ✝ Oosterzee, Friesland, Neth.
            • Pieter Roelofs Slump [1367] (1770-) M
            • Hans Roelofs Slump [1368] (1786-) M
            • Wouter Roelofs Slump [1371] (1804-) M ✶ Oosterzee, Friesland, Neth.
            • Jantje Roelofs Slump [1373] (1806-) M ✶ Oosterzee, Friesland, Neth.
            • Hendrik Roelofs Slump [1374] (1810-) M ✶ Oosterzee, Friesland, Neth.
            • Jan Roelofs Slump [1372] (1808-1879) M ✶ Oosterzee, Friesland, Neth. ✝ Sneek, Friesland, Neth.
              • Roelof Jans Slump [20237] (1837-1920) M ✶ Lemsterland, Friesland, Neth. ✝ Amsterdam, North Holland, Neth.
              • Johannes Jans Slump [20238] (1841-) M
                • Ype Johannis Slump [26475] (1872-) M ✶ Sneek, Friesland, Neth. ✝ Rotterdam, Neth.
                  • Johannes Ypes Slump [26473] (1902-) M
                    • Private [26471] M
                      • Private [26470] M
          • Jan Pieters ` [718] (1745-1801) M ✶ Giethoorn, Overijssel, Neth. ✝ Oosterzee, Friesland, Neth.
            • Jan Slump [20318] (1792-) M ✶ Oosterzee, Friesland, Neth. ?
              • Pieter Slump [20328] (1831-) M ✶ Follega, Friesland, Neth.
            • Pieter Jans Slump [20323] (1798-1885) M ✶ Oosterzee, Friesland, Neth. ✝ Oosterzee, Friesland, Neth.
              • Klaas Slump [20333] (1830-) M ✶ Eesterga, Friesland, Neth.
              • Jan Pieters Slump [20331] (1824-1894) M ✶ Follega, Friesland, Neth. ✝ Follega, Friesland, Neth.
                • Pieter Jans Slump [26478] (1856-1938) M ✶ Follega, Friesland, Neth. ✝ Kuinre (N.O.P.), Neth.
                  • Jan Pieters Slump [26480] (1887-) M
                    • Private [26482] M
                      • Private [26485] M
                      • Jan Pieters Slump [26484] (1957-2014) M ✶ Lemmer, Friesland, Neth. ✝ Apeldoorn, Gelderland, Neth.
                        • Private [26487] M
          • Harmen Pieters Slump [65] (1750-1823) M ✶ Giethoorn, Overijssel, Neth ✝ Oosterzee, Friesland, Neth.
            • Petrus Harmens Slump [1357] (1784-) M ✶ Oosterzee, Friesland, Neth.
            • Jan Harmens Slump [1359] (1788-) M ✶ Oosterzee, Friesland, Neth.
            • Hendrik Harmens Slump [1361] (1792-) M ✶ Oosterzee, Friesland, Neth.
            • Gerrit Harmens Slump [1362] (1800-) M ✶ Oosterzee, Friesland, Neth.
            • Jan Harmens Slump [1364] (1804-1856) M ✶ Oosterzee, Friesland, Neth. ✝ Oosterzee, Friesland, Neth.
            • Roelof Harmens Slump [33] (1779-1850) M ✶ Echten, Friesland, Neth. ✝ Echten, Friesland, Neth.
              • Kornelis Roelofs Slump [716] (1822-) M ✶ Oldelamer, Friesland, Neth.
                • Roelof Slump [1663] (1853-) M ✶ Echten, Friesland, Neth.
                • Jan Slump [1664] (1855-) M ✶ Leeuwarden, Friesland, Neth.
                • Jan Slump [1665] (1858-) M ✶ Echten, Friesland, Neth.
              • Jan Roelofs Slump [17] (1815-1885) M ✶ Oosterzee, Friesland, Neth. ✝ Echten, Friesland, Neth.
                • Roelof Jans Slump [253] (1840-1843) M
                • Fredrik Jans Slump [252] (1852-1933) M ✶ Echten, Friesland, Neth.
                • Franz Jans Slump [254] (1860-1934) M ✶ Echten, Friesland, Neth.
                • Jan Jans Slump [256] (1843-1922) M ✝ Echten, Friesland, Neth.
                  • Harm Jans Slump [28179] (1874-1959) M
                  • Private [28180] M
                • Kornelis Jans Slump [1352] (1850-1926) M ✶ Echten, Friesland, Neth. ✝ Echten, Friesland, Neth.
                  • Jan Cornelis Slump [3020] (1878-) M ✶ Echten, Friesland, Neth.
                    • Hidde Slump [28240] (1901-1988) M ✶ Kuinre, Neth. ✝ Zwolle, Netherlands
                    • Cornelis Jans Slump [3022] (1900-) M ✶ Echten, Friesland, Neth.
                • Roelof Slump [1351] (1845-1929) M ✶ Barsingerhorn, Wieringerwaard Co., North Holland ✝ Echten, Friesland, Neth.
                  • Harm Roelofs Slump [3231] (1885-1964) M ✝ Sneek, Friesland, Neth.
                  • Cornelis Roelofs Slump [3233] (1890-1983) M ✝ buried Echten, Friesland, Neth.
                    • Roelof Slump [3954] (1916-1918) M
                    • Gauke Slump [3953] (1917-) M
                    • Dirk Slump [3956] (1923-2003) M
                  • Willem Slump [26453] (1887-1973) M
                    • Roelof Slump [26450] (1913-1996) M
                      • Private [26452] M
                      • Private [26447] M
                        • Private [26424] M
                        • Private [26449] M
                • Harmen Jans Slump [9] (1847-1902) M ✶ Echten, Friesland, Neth. ✝ Echten, Friesland, Neth.
                  • Anne Harmens Slump [230] (1887-1968) M ✝ Leeuwarden, Friesland, Neth.
                    • Harmen Annes Slump [25748] (1910-2000) M ✶ Sneek, Friesland, Neth. ✝ Apeldoorn, Gelderland, Neth.
                    • Pier Slump [25750] (1916-) M
                    • Ulbe Jan Slump [25752] (1917-) M
                  • Fredrick Harmens Slump [232] (1895-1981) M ✶ Echten, Friesland, Neth. ✝ La Mirada, California
                    • Col. Carl Frederick Slumpff [3000] (1922-1996) M ✶ Detroit, Michigan
                  • Burgemeester Jan Harmens Slump [227] (1880-1934) M ✶ Echten, Friesland, Neth. ✝ Sneek, Friesland, Neth.
                    • Harmen Jans Slump [3236] (1904-1960) M ✝ Echten, Friesland, Neth.
                    • Albert Slump [3241] (1913-1969) M ✶ Echtenerbrug, Friesland, Netherlands ✝ Echtenerbrug, Friesland, Netherlands
                      • Private [26469] M
                  • Cornelis Harmens Slump [231] (1891-1975) M ✶ Echten, Friesland, Neth. ✝ Apeldoorn, Gelderland, Neth.
                    • Herman Slump [2040] (1920-2001) M ✶ Echten, Friesland, Neth. ✝ Beekbergen, The Neth.
                      • Private [2045] M
                      • Private [2046] M
                    • Harmen Slump [2047] (1924-1983) M ✶ Niawier, Friesland, Neth. ✝ Leidschendam, Neth.
                      • Private [2049] M
                      • Private [2051] M
                  • Ale Harmens Slump [5] (1889-1989) M ✶ Echten, Friesland, Neth. ✝ Sebastopol, California
                    • Edward James Slumpff [218] (1925-2007) M ✶ Los Angeles, California ✝ Florida
                      • Private [353] M
                    • Herman Allen Slumpff [2] (1916-1990) M ✶ Detroit, Michigan ✝ South Laguna, California
                      • Private [1] M
                  • Wouter Harmens Slump [228] (1882-1942) M ✶ Groningen, Groningen, Neth. ✝ Wyandotte, Michigan
                    • John Charles Slumpff [358] (1911-1966) M ✶ Patterson, New Jersey ✝ Ecorse, Michigan
                    • Perry Allen Slumpff [360] (1915-1990) M ✶ Grand Rapids, Michigan ✝ Cincinnati, Ohio
                    • Norman Slumpff [364] (1924-1925) M ✶ Ecorse, Michigan ✝ Ecorse, Michigan
                    • Raymond Woodrow Slumpff [362] (1919-2012) M ✶ Ecorse, Michigan
                      • Private [575] M
                    • Herman Walter Slumpff [357] (1909-2010) M ✶ Clifton, New Jersey ✝ Michigan
                      • Private [562] M
                      • Private [560] M
                        • Donald Kim Slumpff [2167] (1962-1995) M ✶ Washington ✝ Riverside Co., Califorinia
                        • Private [2168] M
                        • Private [2169] M
                        • Private [2170] M
                      • Private [561] M
                        • Private [2171] M
                        • Private [2172] M
                    • Walter Slumpff Jr. [361] (1917-2012) M ✶ Grand Rapids, Michigan ✝ Michigan
                      • Private [2208] M
                      • Private [571] M
                      • Private [568] M
                        • Private [2211] M
                      • Private [569] M
                        • Private [2213] M
                    • Private [363] M
                      • Private [578] M
                        • Private [26503] M
                  • Pier Harmens Slump [811] (1878-1939) M ✶ Echten, Friesland, Neth. ✝ Echten, Friesland, Neth.
                    • Harm Slump [1385] (1903-1995) M ✶ Echten, Friesland, Neth.
                    • Atze Slump [1386] (1904-1958) M ✶ Echten, Friesland, Neth. ✝ Echten, Friesland, Neth.
                    • Jan Slump [1384] (1909-) M ✶ Echten, Friesland, Neth.
                    • Durk Slump [1391] (1918-) M ✶ Echten, Friesland, Neth.
                    • Cornelius Slump [1388] (1920-2010) M ✶ Echten, Friesland, Neth. ✝ Lynden, Washington
                      • Perry Kenneth Slump [1402] (1953-1953) M ✶ Vancouver, British Columbia, Canada ✝ Vancouver, British Columbia, Canada
                      • Private [1401] M
                        • Private [3967] M
                    • Anne Slump [1395] (1915-2000) M ✶ Echtenerbrug, Friesland, Netherlands ✝ Rotterdam, Zuid Holland, Neth.
                      • Private [26495] M
                        • Private [26497] M
                        • Private [26498] M
              • Harmen Roelofs Slump [1353] (1812-1892) M ✶ Oosterzee, Friesland, Neth. ✝ Echten, Friesland, Neth.
                • Private [3158] M
                • Private [3155] M
                • Roelof Harmens Slump [3156] (1836-1913) M
                  • Harmen Roelofs Slump [3161] (1863-1942) M
                  • Rinke Slump [3165] (1873-1963) M ✶ Echten, Friesland, Neth.
                    • Roelof Rinkes Slump [3167] (1895-) M
                    • Pouwel Slump [3169] (1898-) M
                    • Hendrik Slump [3171] (1902-) M
                    • Harmen Slump [3173] (1904-1905) M
                    • Harmen Rinkes Slump [3174] (1906-2006) M
                      • Rinke Slump [3211] (1943-1945) M
                      • Private [3212] M
                      • Private [3200] M
                        • Private [3203] M
                        • Private [3204] M
                      • Private [3213] M
                        • Private [26500] M
                        • Private [26501] M
                    • Jurrien Slump [3175] (1907-) M
                    • Rinke Slump [3177] (1910-) M
                    • Geert Slump [3178] (1911-) M
                    • Heiko Slump [3179] (1913-1996) M ✶ Groningen, Neth. ✝ Pretoria, South Africa
                      • Private [26458] M
                        • Private [26466] M
                      • Private [26459] M
                      • Private [26457] M
                      • Private [26455] M
                      • Johannes Slump [26456] (1940-2008) M ✶ Zwolle, Netherlands ✝ Pretoria, South Africa
                        • Private [26460] M
                        • Private [26462] M
                        • Private [26463] M
                          • Private [26465] M