A proto-Celtic form *Ver-caro-s has been reconstructed. The first element may be related to modern Gaelic fìor 'true', or to modern Gaelic fear 'man' (cf. Fergus). The second element is the root of Gaelic caraid 'friend' and Latin carus 'dear'. Thus the name means either "most beloved one" or "beloved man".
- The most common pronunciation includes an intrusive vowel sound after the /r/, which is usual in Gaelic when a liquid sound is followed by another consonant.
Alexander Macbain, Etymology of the principal Gaelic national names, personal names, surnames to which is added a disquisition on Ptolemy's Geography of Scotland, 1911, p. 14.