Jakob married Magdalena Geenen about 1874. Magdalena (daughter of Johannes Philipp Geenen and Margaretha Haberlach) was born on 17 Jun 1853 in Gossersweiler, Pfalz, Bayern; was christened on 18 Jun 1853 in Gossersweiler, Pfalz, Bayern; died on 22 Jan 1911 in Brooklyn, Kings County, New York, USA. [Group Sheet] [Family Chart]

1. George Adam Voelker was born on 6 Jan 1875 in Brooklyn, Kings County, New York, USA; died on 21 May 1913 in New York, USA.
2. Frederick Voelker was born in 0Jun 1876 in Brooklyn, Kings County, New York, USA.
3. Daniel Voelker was born in 0May 1878 in Brooklyn, Kings County, New York, USA.
4. Barbara Voelker was born in 0Dec 1879 in Brooklyn, Kings County, New York, USA.
5. Katherine Voelker was born in 0Dec 1881 in Brooklyn, Kings County, New York, USA.
6. Rosetta Voelker was born in 0Jul 1883 in Brooklyn, Kings County, New York, USA.
7. Simon Voelker was born in 0Jun 1887 in Brooklyn, Kings County, New York, USA.
8. Veronica Voelker was born in 0Feb 1890 in Brooklyn, Kings County, New York, USA.
9. Ottilie Voelker was born in 0Mar 1894 in Brooklyn, Kings County, New York, USA.