禺

noun: a kind of large monkey (archaic), a surname
禺

The character page lists several unrelated, mostly obsolete senses (monkey, area/district, time before noon, alt. form of 愚, alt. form of 偶, mountain name, surname) all sharing the identical Teochew reading with no way to tell which one is meant; the classical 'monkey' sense was picked as the character's core meaning.