Harpur, Harpurson
Harpur, Harpurson—These two names are the anglicised forms of Mac Chruiter, and are a sept of the Buchanans. M'Whirter in Scotland and in Ulster is another form.
Alphabetical Index of Anglicised Surnames in Ireland
See also Woulfe’s Irish Names and Surnames
… and O'Hart's Irish Pedigrees