This name of the famous fifth-century sorcerer and mentor of KingArthur may or may not be a bit wizardy for a real-life modern child. Its most noted modern bearer: football star turned actor MerlinOlsen, whose father was named Merle.
Merlin, wizard of Arthurian legend
Merlin Langstaff, character from the TV series "The Worst Witch"
Merlin, female character in manga/anime The Seven Deadly Sins (Nanatsu no Taizai)
Merlin, a type of bird (Latin name: Falco columbarius)