The McCain surname is a Scottish and Irish surname from the Gaelic name of Mac Gill-Eain. Spelling variations for McCain include MacGhille Eoin, MacClean, MacLane, MacLean, MacClain and MacLaine. In England all McClain families are centered in the northern regions especially in Cumberland, Yorkshire and Lancashire. In Scotland the clan name of McClain is mostly in the western regions, with Renfrewshire having the greater percentages. Within the United States the states with many McClain families include Ohio, Tennessee, Texas, Illinois, Indiana, Ohio and Kentucky. Famous: Dwayne McClain (professional basketball player), Cady McClain (actress), Jonathan McClain (stage and television actor), Michael Sean McClain (a fencing champion), Charley McClain (singer) and Scott McClain (professional baseball player).