A monk of Vesālī. In settling a dispute regarding the estate of his lay-supporter, he was accused of partisanship by one of the parties concerned and was reported to Ānanda. The case went up before Upāli, who decided in favour of Ajjuka (Vin.iii.66-7), and was commended by the Buddha for this decision. ThagA.i.370; AA.i.172.