See Kosambi and Gokhale, Subhāṣitaratnakoṣa, pp. lxviii-lxx. He is one of the few authors of verses contained in the Subhāṣitaratnakoṣa who also has substantial works apart from this collection. These works include Devīmāhāmyā, Rāmamāhātmyā (Rāmacarita?) and a philosophical discourse. His royal patron was Yuvarāja. I suppose the Tibetan form of his name would have to be *Mngon dga', although I haven't noted it anywhere.
According to Gary Tubb of Columbia University (seminar presentation, Jerusalem 2004), there were two Abhinandas living in same general area (Gauḍa) at the same time, both of them known authors. The author of the Rāmacarita was a son of Śatānanda, while the author of the Kādambarīsāra (abridgement of the Kādambarī) was son of Jayanta (he was born in Kashmir, but moved to Gauḍa region). One or neither of them authored the Yogavāsiṣṭhasāra (Laghuyogavāsiṣṭha). An Abhinanda is credited with an extant play entitled Bhīmaparākrama.
