Jacob Coert was born around 1610. His father could be Jan Coert, born around 1570 in Dirksland (he married in 1610). His grandfather could be Clays Court born around 1550 and died around 1628. He was a farmer. He had 4 children. He son Teunis van born around 1640 in Herlingen. He married Matje Bol in Dirksland 12th September 1665. They had a daughter Jannetje Koert, born in Melissant in 1667 and died Oude Tonge 2nd July 1736.