Tinclair, Tinckler
Tinclair, Tinckler—This name Mac An t-Sinclair is a transformation of the old Argyle sept name Mac Na Cearda. This name has no connection with Sinclair, and from it probably arose the Anglo-Scottish dialectic word "Tinkler," a craftsman. The sept Mac Na Cearda were known as Clann Na Cearda, or the Craftsmen. The name is variously written in old records as M'Necaird, M'Nokerd, and M'Nakard. See Caird.
Alphabetical Index of Anglicised Surnames in Ireland
See also Woulfe’s Irish Names and Surnames
… and O'Hart's Irish Pedigrees