Hi there Raul - are you having any luck wit your Crowthers in Lancashire lately?
That's where mine come from too except my ancestors emigrated to Australia.
I have a Robert Crowther and his wife (formerly a Wyatt) of Stockport, Lancs, who had four chn [I think they were sons] of whom my 4G grandfather was the only name I know -Philip Wyatt Crowther.Robert Owned Cotton Mills Heaton Norris Nr Manchester and was Town Mayor Of Preston, Lancashire.
PWC married Sarah Lewis of Montgomery and they had 14 chn, including Joseph[killed in a duel 1829], Elizabeth[died 1828], Sarah, Dr William[1788-1839- emigrated to Australia], Francis, James, Carlos, Henry, Philip, Susan and four boys whose names I don't know.
Should you or anyone else recognise these folk, or wish to offer general advice, I'd be very happy to hear from you - firstname.lastname@example.org - or else search my site http://www.tassie.net.au/~rteirney/http://www.tassie.net.au/~rteirney/ and leave a message in the guestbook.