It depends - if the name is Welsh (which seems likely) then "wyn" means "white", and if it's English then "wyn" means "friend" - but that is less common.
Maewyn I would guess is more likely to be Welsh than English. The "mae" part I'm not sure about, but it could potentially be from "mael" meaning "devotee" in Irish, as in
Maeleachlainn.
A search for Succat brings up lots of links to Jewish festival sites and sites related to Argentina, but I couldn't get any closer than that. Sucat brings up lots of sites about
Brittany Bay, wherever that is!
:-)
♦ Chrisell ♦