Hi Ed This information comes from a book called "Dictionary of German Names by Hans Bahlow:
Veit(h), Veidt, Fei(d)t, Veitl: Saint Veit (Latin=Vitus), patron saint against fire,lightning and :saints Vitus Dance" (chorea minor).Cf. St Veit Cathedral in Prague and the sculptor Veit Stoss. See also Vaith and Vieth. Vix.