Cleah is of Hebrew origin, meaning 'cognizant', derived from the Hebrew word 'akhlah' which means 'intelligent'. It is a unique and distinctive name that has gained popularity in recent years. Cleah was first introduced as a given name by American author Ursula K. Le Guin in her Earthsea series, where it is borne by one of the main characters.
Cleah was a unique name in 1918 with only five newborn girls bearing it that year.