1. | Jacobus Anthonius Siefkens was born about 1859 in Alkmaar. Jacobus married Maria Martijntje van Tilburg on 18 Sep 1907 in Amsterdam. Maria (daughter of Antonius van Tilburg and Grietje van Boomen) was born on 11 May 1861 in Kollum. [Group Sheet] [Family Chart] |