Not easy. Did she have brothers come with her to Canada? Relatives who passed away in Larne whose obits might name family members in Canada? Year she married? Church she married in? Fathers profession -might relate to his obit here in Canada. Was the London address her married address? Don't discount Larne, the family may still have relatives there.The 1960's Canadian voting lists are online with ancestry.ca but without a first name for eligible voter can't search.