Blain Is A Boys Name Of Gaelic Origin. Traditionally A Scottish Surname, This Variation Of Bleen Means "yellow." Saint Blane Is An Early Scottish Bishop Whose Feast Day Falls In August. Whether You Want To Highlight Your Gaelic Heritage Or Celebrate Your Faith, A Versatile Name Like Blain Can Do It All. If You Have A Passion For Creative Arts, You Can Also Call Baby After Your Favorite Color. Whatever They Get Up To, Baby Blain Is Sure To Light Up Your Days With Their Bright Personality.