Amarṣa (Amarsha) was the son of Sugandhi, in the genealogical line of Kuśa (Kusa), son of king Rāmacandra (Ramachandra) of Ikṣvākuvaṃśa (Ikshvakuvamsa; the Iksvaku dynasty). He had a son called Mahasvān (Mahaswan).
In Bhāgavatapurāṇa (Bhagavatapurana) he is mentioned as Amarṣaṇa (Amarshana), son of Sandhi.