ITALO-CELTIC. In many important respects the Celtic languages (q.v.) resemble the Italic languages (q.v.) so closely that it has been proposed to group them together as a unit group of the Indo-European family. When historical evidence became available, differentiation had progressed so far that, while an earlier unity is permissible, they should be kept separate. Ligurian
and Sicilian were certainly spoken Greek or Latin. There are affinities with Venetic.
See Walde, Ober Alteste Spriichliche Beziehungen zwischen Kelten and Italienern 09'7).