from Svanto-vit, name of a Slavic god worshipped with ecstatic dances on the Baltic island of Rügen, transferred by Christian missionaries to Saint Vitus. The Italian form of the name is Guido.
Examples from the Web for vitus
So Dave Grohl, Krist Novoselic, and Pat Smear headed to Saint Vitus bar in Greenpoint, Brooklyn, to rock out some more.
This was the little church of Saint Vitus, a perfect example of the genuine Byzantine arrangement on a very small scale.Sketches from the Subject and Neighbour Lands of Venice|Edward A. Freeman
Then they all set to at the dancing, like the blessed Saint Vitus and his cousins, and surely it was a beautiful sight to look at.Bits of Blarney|R. Shelton Mackenzie
Vitus Behring, the Dane in the Russian service, was in supreme command of the expedition; and to him belongs the glory.Alaska|Ella Higginson