Hi Wanita, My great,great,great grandfather was Joseph Vassar and he was born in 1815 in Maine.He married a Mary Pelkey and she is the only wife that we have come across.He is the only Joseph Vassar that I have on my side. His son Fredrick was my great great grandfather,his son William was my great grandfather and his daugther Maud was my grandmother. They settled in Sciota,Clinton County,N.Y.. Joseph had many children maybe one of them or their children had a Joseph that would be your relation. Sorry I couldn't help out more.
Vicki P.S. I do have the names of Joseph's children and some of the places they lived if you think that might help out.