O.E. cild "child," from P.Gmc. *kiltham (source of Gothic kilței "womb"), unrelated to other languages. Also in O.E. meaning "a youth of gentle birth" (archaic, usually written childe). In 16c., especially "girl child." The difficulty with the plural began in O.E., where the nom. pl. was at first cild, identical with the sing., then c.975 pl. form cildru (gen. cildra) arose, only to be re-pluraled c.1175 as children, which is thus a double plural. M.E. plural cildre survives in Lancashire dialect childer and in Childermas (c.1000) "festival of the Holy Innocents" (Dec. 28).