Vitu

Uncertain. Historically often related to the name of an early Sicilian martyr, as in Late Latin Vitus, borrowed from an unknown substrate, possibly from a Thracian one (suggested to mean "a person from Bithynia"). It seems possibly derived from the same root that gaves us English Guy and Italian Guido, which was rendered in Vitus; ultimately derived from the same cultural stratum of Proto-Celtic *widus (“wood”) or Proto-Germanic *widuz (“wood”). If the sources were several, a conflation between these has possibly occurred.