Leslie Robert Lawrenson (July 25, 1902 - 1978) was Dean of Derry from 1946 until 1967.
Born in 1902, he was educated at Trinity College, Dublin and ordained in 1926. Hayes was a curate at Derry Cathedral, the rector of Donegal from 1930 to 1938 and then of Conwal and Leck until his appointment to the deanery.