Saint Barlock has been identified with Finbarr of Cork. Around 1179, John Fitzherbert, 3rd Lord of Norbury, built a church in Norbury dedicated to St Barlacus. (Fitzherbert had previously been Governor of Waterford.}[4] This church replaced a previous Anglo-Saxon one, which may also have been named for Barlock. Historian John Blair suggests a connection between the name Barlock and the Welsh "Barrog".[5]
The name also appears as Saint Barlok in a 1491 charter.[6]