Stocker
Stocker—This name is a shortened anglicised form of M'Instocker and McStocker in Scotland and Ulster; in Gaelic Mac an Stocaire, from Stoc, a Gaelic Trumpet; hence stocaire, trumpeter, a McFarlane sept. The name is also anglicised Stafford in Ulster.
Alphabetical Index of Anglicised Surnames in Ireland
See also Woulfe’s Irish Names and Surnames
… and O'Hart's Irish Pedigrees