Kelly

Kelly derives from the Irish surname Ó Ceallaigh, meaning descendant of Ceallach, a name of uncertain but likely Old Irish origin possibly connected to ceall, meaning church or monastery, or alternatively to a root meaning bright-headed or warrior. It was one of the most common surnames in Ireland before transitioning into widespread use as a given name in English-speaking countries during the twentieth century. The name gained particular popularity as a feminine given name in the United States from the 1950s onward, partly influenced by actress and princess Grace Kelly. Variant forms and cognates include Kelley, Kelli, and Kellie.