सिध्यः Sidhya

Third name of Puṣya alongside Tiṣya, 'the auspicious/successful one'. Colebrooke glosses the trio 'Stars in Cancer'. The Śārdūlakarṇāvadāna gives Puṣya three stars in a vardhamāna (auspicious-mark) figure, matching δ, γ and θ Cancri.

See the pushya entry for the three-witness collation of sidhyau vs siddhyau.

A significant upgrade for this entry: the database currently has Sidhya only from the Amarakośa (c. 5th c. CE), but it is PĀṆINI'S OWN WORD at 3.1.116 puṣya-sidhyau nakṣatre, where the sūtra itself carries the qualifier nakṣatre — Pāṇini forms sidhya specifically as an asterism name and for no other purpose. That pushes the attestation back roughly a millennium and makes it firmly datable. Patañjali on 1.2.63 confirms it is in living use as a synonym in the compound sidhya-punarvasū (see the tishya entry). Reading verified across three witnesses: Wikisource Devanāgarī पुष्यसिध्यौ, GRETIL 'alt' puṣ-ya-sidh-yau; only the Kāśikā-derived GRETIL file has the aberrant siddhyau. Note the semantic pairing — puṣ 'to thrive' and sidh 'to succeed' — which is why the two are given in one sūtra; whether Pāṇini regarded Sidhya as a synonym of Puṣya or as the name of a neighbouring asterism he does not say, but Patañjali clearly takes it as a synonym.