+--Gerrit Martens +--Johannes Martens (5 Apr 1815-9 Nov 1888) | +--Lena Welink Gerrit Jan Martens (10 May 1843-13 Mar 1911) | +--Harm Ekelhoff +--Jennigien Ekelhoff (28 May 1815-21 Jul 1890) +--Aaltin Martens