Many surnames in Western Europe originally came from Roman Italy. Other versions of this surname are: in Portugal - Freixo, Scotland - Fraser/ Frazer/ Frasier, and I think in France: Fraselier. This process continues today i.e. Cadaya (from the Basque country) became Cadahia in Lugo, Spain; later became Codyre (in Ireland); transforming to Codyer in U.S.A. This process of the same name changing as people move from country to country over time is technically called "corruption." Although I don't think that's a suitable term to describe this interesting process.