I was looking thru the message boards, and your post caught my attention. I have some information you are looking for. Not a whole lot, but it's a little bit.
My great-great-great grandfather was Dirk Ubbens who's mother passed a way when he was very young. I don't have any information on siblings, but he was adopted by his mother's brother whose last name was Beving. Unfortunately this is all the information I have.
I am just starting to delve deeper into my history.