The Compendium of Caraka 4.8.50_1

4.8.50_1

tatrābhiprāyikaṃ ghoṣavadādyantasthāntamūṣmāntaṃ vā+avṛddhaṃ tripuruṣānūkamanavapratiṣṭhitaṃ, nākṣātrikaṃ tu nakṣatradevatāsamānākhyaṃ dvyakṣaraṃ caturakṣaraṃ vā//

Of these, the conventional name should begin with a voiced consonant and end in a semi-vowel or end in a sibilant, be unelongated, follow three ancestors, and not be unestablished; the constellation name, however, should have the same designation as the presiding deity of the constellation, with two syllables or four syllables.