Outer reach of Norman Conquest in West Cork, Caheragh in ownership pre 1317 of John de Cogan, cluster of Norman surnames in area Burke, Barrett, Goggin, devolution of Townlands to Monasteries of Youghal and Waterford.

From Maziere Brady’s history of Cork Dioceses online Cork and Present:

Maziere Brady de Cogan Rotated Caheragh Scanned MEE Image

Maziere Brady:

The Cathedral of St. Finbarrs, in Cork, succeeded in title to some of the old Norman lands including the townland of Letterlickey nearby as well as lands in Schull. Kilcrohane and the Bantry area.