Sometimes used as a plural. A type of gaṇa (gana) or group of sages or ascetics, just like Bālakhilya (Balakhilya). This is explained by Nīlakaṇtha (Nilakantha), the annotator of Mahābharata (Mahabharata)—
ajādayaḥ vālakhilyavad ṛṣīṇāṃ gaṇaviśeṣāḥ.