Me again !

I was wondering if someone could help. Brian Lawson managed to provide me with the following information about my line of the stowell family from the 1891 census.

Ramsey, district 5, entry 215, 5 Bark Lane
John Stowell, head, married, 41, mariner, employed, Ramsey
Margaret, wife, married, 39, Jurby
John, son, 16, messenger, employed, Ramsey
William, son, 13, messenger, employed, Ramsey
Amy, daughter, 3, Ramsey

Thankyou very much Brian - I was wondering whether there is any information about this family in any of the earlier census's?? Especially in relation to John Stowell (I'm trying desparately to find out who his parents and siblings were). Also I was wondering if there is any way of finding out Margarets maiden name from the census information or does anybody know where I can possibly find it out??

Thanks Again!
Claire