What does "ycleped" mean?

Ycleped: Called; named; -- obsolete, except in archaic or humorous writings. [Spelt also yclept.] It is full fair to ben yclept madame. Chaucer. But come, thou goddess fair and free. In heaven ycleped Euphrosyne. Milton. Those charming little missives ycleped valentines. Lamb.