Art m
English, Irish, and Scottish: now generally taken as an informal short form of ARTHUR (SEE Arthur). There is also a traditional Gaelic name of this form (from the vocabulary word art bear) which has generally been Anglicized as Arthur although it in fact has no connection with that name. In the diminutive form Artan it has given rise to the Skye surname Mac Artain, Anglicized as McCartan.
First names dictionary. 2012.