Arthasiddhi was one of the Sādhya (Sadhya) gods born of the womb of Sādhyā (Sadhya), daughter of Dakṣa (Daksha) and sired by Dharma. Arthasiddhi was the son of these gods.

Bhāgavatpurāṇa Vols. 1-12(6.6.7)