I don't really have any direct info' for you but I do have some Lewis ancestors myself. I haven't managed to find out much more than that Catherine Lewis married Thomas Preston in 1857.Although they were both from the IoM, they went to Liverpool to marry, lived there for a few years, had their first 2 children there, returned to Castletown, settled there and had 3 more children. Interestingly their first son, my gt.gt. fr'father was ch. William John!
Catherine's father was caller Hugh but I've found out nothing about him yet, except that he was 50 in 1841 and that the family then lived in Douglas, when Cath was 14. There was a William, aged 45 there too. Perhaps he was Hugh's brother? Lewis does not seem to be a common name on the IoM so there may well be a connection. Perhaps we can keep in touch? I'm hoping to visit the Island again this summer so I may be able to find out more then.
Regards, Jo