1. | Helenius Jans Onnes Family/Spouse: Riefke Cornelius Muller. [Group Sheet] [Family Chart]
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2. | Cornelius Jans Onnes (1.Helenius1) was born about 1831 in Kroonpolder, Beerta, GR, NLD. Cornelius married Corneliske Jans Zijlker on 17 May 1859 in Beerta, GR, NLD. Corneliske (daughter of Jan Freerks Zijlker and Talje Derks de Ruiter) was born about 1834 in Nieuw Beerta, GR, NLD. [Group Sheet] [Family Chart] |