Latin word viculus comes from Latin -olus, Proto-Indo-European *wey-, Proto-Indo-European *weiḱ-

Detailed word origin of viculus

Dictionary entry	Language	Definition
-olus	Latin (lat)
*wey-	Proto-Indo-European (ine-pro)
*weiḱ-	Proto-Indo-European (ine-pro)
*weyg-	Proto-Indo-European (ine-pro)
vicus	Latin (lat)	Municipal section or ward, farm. Street; quarter, neighbourhood; row of houses. Village; hamlet.
viculus	Latin (lat)	(Medieval Latin) a minor lane, side-street, or alley. A small vilage or hamlet.