I have William's death certificate from Massachusetts that states that his parents were John Carney and Mary Moclair; he died in 1908. I have not tried to get a birth certificate yet. It is interesting that you mentioned a Thomas because there was a rumor that William had an infant son who died whose name was Thomas so perhaps William did have a twin named Thomas and maybe that was the mysterious brother that family history says went to Australia. Do you know where I would have to write to get a birth certificate for William and Thomas? Thanks a lot.