A "palmer" in medieval times was a pilgrim who returned from the Holy Land with a palm branch or leaf. Between 1185 and 1188 Ailred the Palmer and his wife took religious vows and founded a priory and monastic hospital of Crutched Friars outside the West Gate of Dublin, on the road to Kilmainham, which they endowed with all their property. In 1188 Pope Clement III confirmed the priory's grants, including the both the parish of Palmerstown west of Kilmainham and the other parish of Palmerstown northwards in Fingal. Gerard Lee notes an association of palmers with leper hospitals, of which there was one dedicated to Saint Laurence in the townland of the same name in Palmerstown.