| Background: This name in modern times is spelt in three different ways - Lawlor, Lalor, Lawler - the first of these being slightly more numerous than the others. In Irish it is O Leathlaoghair, which would appear to denote descendant of the half leper, no doubt a nickname arising from physical defect and not to be taken literally. The prefix O, it may be noted, which was discarded during the period of Gaelic submergence, has not been resumed in modern times. The O'Lalors, like their kinsmen the O'Mores, were one of the Seven Septs of Leix. They were located near the famous Rock of Dunamase in Co. Leix, but were driven from this territory by the English invaders under Queen Elizabeth 1.
Variations: Lalor, O'Lalor, Lawlor, Lawler, Leathlaobhair.
More Info: http://heraldry.celticradio.net/search.php?id=129
Discussion of this family is welcomed.