Marrgu (Marrku) is a recently extinct Aboriginal language of northern Australia. Additional names include Ajokoot, Croker Island, Raffles Bay, Terrutong (Terutong), Yaako (Jaako, Yako).[1]
Marrgu had been assumed to be an Iwaidjan language like its neighbours. However, Evans (2006) has produced evidence that it was a language isolate,[2] with possible connection to the extinct and poorly attested Wurrugu. This connection however is merely theoretical.
Marrgu had the three-vowel (/a/, /i/, /u/) system typical of Iwaidjan languages (Evans 1998).