Geert married Alijda Sap on 01 March 1832 in Groningen, Groningen, Nederland. Alijda (daughter of Harmannus Geuchjes Sap and Beka Sijbrands Menninga) was born on 27 May 1802 in Emden, Ostfriesland, Niedersachsen, Deutschland; was christened on 03 June 1802 in Emden, Ostfriesland, Niedersachsen, Deutschland; died on 20 April 1870 in Weststellingwerf, Friesland, Nederland. [Group Sheet] [Family Chart]

1. Magrieta Gezina Ellerbroek was born on 03 October 1832 in Assen, Drenthe, Nederland; died in Date unknown.
2. Hermannus Gerhardus Ellerbroek was born on 04 December 1833 in Assen, Drenthe, Nederland; died on 04 June 1901 in Frederiksoord, Vledder, Drenthe, Nederland.
3. Oedo Jacob Ellerbroek was born on 11 August 1835 in Assen, Drenthe, Nederland; died in Date unknown.
4. Geuchien Georg Ellerbroek was born on 15 April 1837 in Assen, Drenthe, Nederland; died on 08 October 1838 in Assen, Drenthe, Nederland.
5. Geuchien Georg Ellerbroek was born on 09 February 1839 in Assen, Drenthe, Nederland; died on 14 September 1912 in Weststellingwerf, Friesland, Nederland.
6. Bernardus Jacobus Ellerbroek was born on 08 January 1845 in Assen, Drenthe, Nederland; died in Date unknown.