The term "progenitor" indicates a person that is an originator of a line of descent; a precursor. I've kept track of all the "beginning" lines of the various families that have been researched. Below is an alphabetical list of those individuals, while some have only a few descendants, others may have many. In time this list should grow smaller as we find more connections with the the families that bear the Scholderer / Scholder name. Please take a miniute and look through some of these individuals to see if you know of any further connections of ancestral connections.
Beck
Beatrix Scholder
Lundy
Gertrude M.  (16 Mar 1914 - 4 Mar 1991)
Scholder of Swart
Jan Engelsz  (10 May 1752 - 1 Jul 1827)
Scholder
Adam J.  (5 May 1826 - 20 Aug 1874)
Agnes  (c 1640 - )
Agnes  (25 Jul 1865 - )
Agnes  (12 Nov 1897 - May 1982)
Albert  (c 1837 - )
Alix Susan
Alois  (11 Aug 1947 - )
Anita  (2 Mar 1904 - 2 May 1989)
Anna  (7 Jul 1904 - Oct 1975)
Anna Maria  (c 1721 - )
Annetje Joppen  (16 Jul 1803 - )
Antje Jacobs  (c 1723 - c 1749)
Antje Jans  (1770 - 1811)
Anton  (c 1852 - )
Arndt  (c 1656 - )
Arthur  (2 Sep 1904 - May 1976)
Barbara  (c 1789 - 1851)
Beatrice  (1 Apr 1887 - Nov 1975)
Beatrice  (24 Oct 1889 - Apr 1982)
Bennet  (1823 - )
Bernard  (20 Jan 1903 - Feb 1977)
Betty M.  (29 Aug 1920 - 25 Aug 1995)
Brett David
Bruce  (7 Jun 1950 - Jun 1973)
Carol
Catharina Willemina  (c 1860 - )
Catharine  (1827 - )
Catrina  (c 1677 - )
Charlotte  (27 Jun 1901 - Jan 1984)
Christian  (c 1771 - )
Scholder (cont.)
Christian  (c 1783 - )
Christian  (c 1805 - )
Christian  (c 1807 - )
Christian  (c 1840 - )
Christoph Gottlieb  (c 1788 - )
Clara H.  (25 Dec 1895 - Dec 1983)
Clemensen  (c 1679 - )
Clementis  (c 1606 - )
Conrad  (1833 - )
Cornelia Jans  (15 Oct 1868 - 31 May 1946)
Costler
Daniel  (c 1837 - 30 Jan 1908)
David M.
Dirk Klaasz  (1677 - 1741)
Domenick  (1796 - )
Dora  (16 Sep 1888 - Oct 1974)
Dorothea  (c 1774 - )
Dorothea  (c 1779 - )
Edward  (c 1838 - 20 Aug 1864)
Edward  (1855 - Dec 1931)
Elias  (c 1860 - )
Elisabetha  (c 1769 - )
Elizabeth  (22 Dec 1729 - 24 Feb 1823)
Elizabeth J.  (29 May 1950 - 16 Apr 1997)
Else  (27 Mar 1906 - Mar 1975)
Elsie  (7 Mar 1911 - Oct 1991)
Emilie
Erich  (27 Jul 1897 - 7 Sep 1960)
Ernst
Ernst  (1826 - )
Scholder (cont.)
Ernst  (c 1828 - )
Ernst  (18 Oct 1914 - 29 Dec 1996)
Esther  (29 Oct 1913 - 14 May 2000)
Eunice C.  (14 Feb 1928 - 11 Jan 2001)
Eva  (c 1667 - )
Fany  (c 1859 - )
Frederick William  (21 Mar 1888 - )
Fried  (1835 - )
Friederika Christina  (c 1853 - )
Fritz William IV
Georg  (c 1556 - )
Georg  (c 1689 - )
George  (1831 - )
Gottlob Wilhelm  (25 Jun 1896 - 23 May 1957)
Grace M.  (11 Aug 1895 - Dec 1983)
Gustav Adolph  (c 1819 - )
Hanss Jerg  (c 1695 - )
Harriet  (11 May 1890 - Aug 1963)
Harriet  (7 Jun 1917 - 17 Mar 2003)
Hendrik  (1830 - 13 Jul 1867)
Henrici  (c 1729 - )
Henry  (1825 - )
Henry  (1867 - )
Herbert
Herman  (c 1825 - )
Hermann  (1828 - 1901)
Ida Karoline  (c 1869 - )
Jacob  (1867 - 16 Dec 1929)
Jacob Daniel  (c 1793 - )
Jacob Friedrich  (c 1750 - )
Scholder (cont.)
Jacob Friedrich  (c 1802 - )
Jacob Klaasz  (20 Dec 1777 - 19 Mar 1827)
Jacob Ludwig  (c 1782 - )
James  (c 1915 - )
James F.  (c 1894 - 24 Apr 1900)
Jansje Cornelia
Jean  (6 Mar 1900 - Jul 1966)
Jean Guillaume  (c 1786 - )
Jeanette  (22 Nov 1894 - Aug 1972)
Joanna  (1755 - )
Johann Abraham  (c 1832 - )
Johann Georg  (c 1688 - )
Johann Georg  (c 1723 - )
Johann Georg  (c 1788 - )
Johann Georg  (c 1795 - )
Johann Martin  (c 1823 - )
Johanna  (19 Mar 1867 - )
Johannes  (c 1693 - )
Johannes  (c 1807 - )
Johannes  (c 1810 - )
Johannes  (c 1832 - )
John  (1784 - )
John  (1785 - )
John  (1822 - )
John  (c 1828 - )
John  (c 1834 - 21 Jan 1878)
John  (1860 - )
John P.  (1869 - )
Joseph
Joseph
Scholder (cont.)
Joseph
Joseph  (c 1798 - )
Joseph  (Mar 1828 - )
Joseph  (Feb 1859 - 20 Oct 1938)
Juliana  (c 1855 - )
Julias
Julius  (25 Jun 1899 - Jul 1987)
Katharina  (c 1783 - )
Klaas  (1843 - )
Lawrence  (Aug 1840 - b Apr 1910)
Lorena E.
Louis  (6 Dec 1893 - Jun 1966)
Louis S.  (Sep 1857 - )
Luest
M. H.
Maerten  (c 1635 - )
Magdalena  (c 1791 - )
Maggie  (c 1880 - )
Margaretha  (c 1592 - )
Margaretha  (c 1789 - )
Maria Elisabetha  (c 1794 - )
Marie  (11 Mar 1910 - 15 Mar 1997)
Marioara K.  (9 Feb 1899 - 15 Jun 1967)
Marry
Martha  (9 Nov 1899 - Apr 1978)
Martha Mathilda  (6 Sep 1905 - )
Mary  (1850 - )
Matthews  (1902 - )
Max  (1 Jan 1904 - May 1981)
Maxine Anne  (26 Jun 1921 - 27 Oct 2007)
Scholder (cont.)
Mayer  (c 1896 - 29 Oct 1898)
Meier
Michael  (c 1646 - )
Michael  (c 1845 - b 1910)
Morris  (6 May 1905 - May 1974)
Norman  (24 Jun 1912 - 27 Jun 1993)
Penny P.  (10 Mar 1926 - 13 Jan 1990)
Peter  (c 1674 - )
Peter Daniel  (c 1762 - )
Robert  (17 Jan 1935 - 29 Jul 1999)
Robert Michael  ( - 31 Mar 2013)
Ronald Robert
Rosa  (17 Apr 1926 - 23 Sep 2006)
Rose  (1 Jan 1920 - 23 Mar 1996)
Rudolf  (c 1907 - )
Ruth  (8 Jun 1903 - Dec 1981)
Sarah  (12 Feb 1907 - Jan 1989)
Sibilla Sabina  (c 1765 - )
Stephen H.
Steven  (30 Oct 1943 - Feb 1981)
Valentine  (c 1865 - )
Virginia E.
Wilhelm  (c 1641 - )
Wilhelm  (c 1657 - )
Wilhemus  (c 1734 - )
William
[—?—]
[—?—]
[—?—]
[—?—]
Scholder (cont.)
[—?—]
[—?—]
[—?—]
[—?—]
Scholderer
Andreas
Anna Katahrina  (c 1693 - )
Anne Marie
Anton  ( - 8 Oct 1918)
Barbara
Barbara  (c 1826 - )
Charlotte
Christ  (c 1833 - )
Christian  (c 1742 - )
Christian  (c 1761 - )
Christian  (c 1762 - )
Christian  (c 1880 - )
Christine Magdalene Emma  (c 1864 - )
David  (c 1729 - )
David  (c 1799 - )
Dorothea  (c 1772 - )
Dorothea  (c 1792 - )
Dorothee
Elisabeth  (c 1839 - )
Elisabetha  (c 1774 - )
Ernst  (12 Apr 1913 - 10 May 1945)
Esther Margretha
Eugen  (27 Mar 1891 - 25 Oct 1917)
Fritz  (23 Oct 1918 - 1944)
Georg  (c 1549 - )
Georg  (c 1560 - )
Georg  (c 1670 - )
Georg  (c 1736 - )
Georg  (5 Sep 1914 - 23 Feb 1945)
Georg Jacob  (c 1761 - )
Scholderer (cont.)
Hans  (c 1620 - )
Hans  (c 1640 - a 1666)
Hans Jerg  (c 1679 - )
Hieronymus  (c 1590 - )
Imanuel
Jacob  (c 1537 - )
Jacob  (c 1749 - )
Jean Frιdιric  (c 1820 - )
Jean Martin  (c 1785 - )
Jerg  (c 1589 - )
Johann  (c 1747 - )
Johann Georg  (c 1655 - )
Johann Georg  (c 1682 - )
Johann Georg  (29 Aug 1758 - )
Johann Georg  (c 1771 - )
Johann Georg  (c 1773 - )
Johann Georg R.  (c 1706 - )
Johann Jakob
Johann Wilhelm  (5 Nov 1849 - )
Johannes  (c 1672 - )
Johannes  (c 1714 - )
Johannes  (c 1742 - )
Johannes  (c 1781 - )
Johannes  (c 1788 - )
Johannes  (c 1843 - )
Johannes Ulrich  ( - b 1787)
John Philip  (c 1854 - )
Karl
Karl  (c 1880 - )
Karl  (11 Dec 1919 - 11 Aug 1942)
Scholderer (cont.)
Karl Wilhelm  (c 1815 - )
Katharina Dora
Kurt  (13 Jun 1926 - 5 Dec 1945)
Leonhard  (1510 - 5 Feb 1588)
Maria Dorothea  (13 Jul 1765 - 21 Feb 1788)
Marta Magdalena  (c 1765 - )
Martin  (c 1600 - 23 Sep 1635)
Matthes  (1570 - )
Michael
Michael  (c 1570 - )
Peter
Samuel  (c 1806 - )
Susanne Marie Margarethe  (26 Feb 1849 - )
Sybilla  (c 1769 - )
Vrsula
Wilhelm  (c 1828 - )
Wilhelmina Louisa  (1 Apr 1832 - )
William  (Nov 1849 - )
[—?—]
[—?—]
Schollerers
Stefan
Scholter
Elizabeth  (1879 - )
Scholterer
Charles Gustav  (4 Oct 1873 - Mar 1970)
George  (May 1865 - 30 Jun 1943)
Sholder
Alexander  (23 Apr 1905 - Nov 1976)
Anna H.  (1884 - 23 Jul 1958)
August
Barry L.
Benjamin  (3 Sep 1900 - May 1973)
Bennie  (1875 - )
Charles J.  (1898 - )
Charles M.
Clara E.
Daniel J.
David
David  (1870 - )
Edward  (1836 - 3 Aug 1864)
Elisha  (1826 - )
Emanuel
Frank S.  (Oct 1863 - )
George S.  (Feb 1870 - 1945)
Henry  (1834 - )
Isadore  (1894 - )
Jason A.
Johannes  (c 1750 - )
Jonathan M.
Joseph  (12 Mar 1900 - May 1966)
Julius  (15 Jul 1928 - Jun 1980)
Kenneth A.
Lainie Diane
Louis  (10 Jul 1879 - Mar 1964)
Margaret
Margaret P.
Martin A.
Sholder (cont.)
Maurice  (2 Jan 1901 - Apr 1976)
Maurice  (1902 - )
Max  (1892 - )
Ronald
Sam  (1887 - b 1940)
Vitus  (c 1750 - )
[—?—]
Sholders
Benjamin F.  (9 Sep 1889 - 25 Jan 1954)
Lena  (29 Aug 1897 - 20 Jun 1983)
Valentine Eugene Jr.  (15 Dec 1920 - 11 Jul 1971)
Shoulder
Conrad  (1815 - )
Lawrance  (c 1835 - 8 Mar 1906)
Student
[—?—]
[—?—]
Agusta  (1846 - )
Deborah Abell
Elise J.
Erna  (26 Mar 1908 - 15 Sep 1990)
Ethel  (13 Dec 1906 - Nov 1974)
Janet M.
Jeannette  (4 Jul 1905 - 14 Sep 1990)
Lena  (20 Oct 1908 - Sep 1983)
Linda L.
Margaret C.
Patricia E.
Robin B.
Rose  (22 Feb 1885 - Jun 1971)
Rose  (9 Feb 1894 - Oct 1968)
Rosine  (c 1860 - )
Sadie  (12 May 1895 - Feb 1978)
Sara  (14 Mar 1914 - 12 Jun 1997)
Susannah  (1775 - )
Susie D.
Tamara S.