 Jan Bernardus Koelmans, son of Bernardus Jans Koelman and Beitske Jacobs Hettinga.Born 1 Nov 1806 Koudum, died 14 Sep 1853 Indijk, age 46 years, buried Woudsend Married 13 Jun 1829 Wymbritseradeel, age 22 years (married 24 years) to:  Elisabeth Syberens Ydema, age by marriage 19 or 20 years, daughter of Sybren Klazes Yedema and Doetje Ypes.Born 1809 Oudega | |||
| 2nd marriage Jan Bernardus Koelmans, son of Bernardus Jans Koelman and Beitske Jacobs Hettinga. Married 3 Oct 1835 Wonseradeel, age 28 years (married 17 years) to: Akke Johannes Polder, age by marriage 21 years, daughter of Johannes Johannes Polder and Geertje Durks Vallinga.Born 20 Apr 1814 Gaast, died 7 Jun 1899 Bolsward, age 85 years, buried Blauwhuis, 1st marriage to: Jan Bernardus Koelmans, 2nd marriage to: Sjoerd Taekes Hiemstra | |||