Arthur, Arthurs
Arthur, Arthurs—This name in Ulster and Scotland is the anglicised forms of McArthur, which surname was the leading clan of the Siol Diarmuid O Duibhne, latterly called the Clan Campbell, until they were superseded by the McCallions, the junior branch of the clan, in Gaelic Mac Artair. Other anglicised forms are Carter and McCarter, the former being the Isle of Man form.
Alphabetical Index of Anglicised Surnames in Ireland
See also Woulfe’s Irish Names and Surnames
… and O'Hart's Irish Pedigrees