+--Jacob Treur (7 Mar 1815-30 May 1902) +--Jan Treur (25 Mar 1842-13 Aug 1926) | | +--Abraham Jacobsz Oppelaar (15 Aug 1778-25 Aug 1818) | +--Cornelia Oppelaar (1817-3 Aug 1876) Jacob Treur (1 Apr 1876-1901)