Unfortunately i don't know much about the Mavitta's in Canada/US I just remember that my uncle Gerald (actually great uncle) who was Helens's father had visited relatives in US. Helena lives in Boston and there are tons of cousins on east coast (Gerald had 9 kids) . I am in N.Ireland. My grandfather was Geralds brother Walter, and his father was Harry French who married Alice Mavitta. Gerald was in merchant navy and jumped ship in 20's that how the family ended up in Mass. Looks pretty certain that your father was Mavitta