New information I was not aware of, thank you, that does seem to be my William alright as he is married in cork in 1906 was he only to my great grandmother. As you have noted John and robina may not be his biological parents however, he is in cork in 1906 (quite young)married and yet there is another record of a William Henry on the 1911 cencus and 1921 listed as son to John and robina in isle of man. Was there another?