+--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 
Jennigien Martens  (6 Nov 1872-3 Feb 1959)
|     +--Arend Bossink 
|  +--Gerrit Jan Bossink  (ABT 1806-)
|  |  +--Johanna Valk 
+--Johanna Bossink  (26 Jan 1844-18 Mar 1892)
   |  +--Derk Bril 
   +--Hendrika Bril  (ABT 1814-)
      +--Geertjen Braakman