Trevor m
Welsh and English: transferred use of the Welsh surname, which in turn is from a placename. There are a large number of places in Wales called Trefor, from the elements tref settlement + fôr, mutated and unaccented form of mawr large. In recent years, Trevor has also become popular as a given name among people who have no connection with Wales.
Welsh form: Trefor.
Short form (informal): Trev.
First names dictionary. 2012.