What is your father's name and those of his siblings? I'm researching a line which contains a Peter Blokker, born in 1839/1840. He married a Gertie (maiden name not known), born also in Holland approx. 1840. They came to the Chicago (Roseland) area in 1873. They had Mary (1867?), Nellie (Nelltje 1869?), Edward (1871?), Ticey (1875?), Katie (1878?), and Simon (1883). My husband is a descendant of Simon. The spelling changed to Blocker in the States.
Any information is greatly appreciated!