The Chāndogya Upaniṣad (1.2.13) mentions one Baka-dālbhya, as a sage who had realized the prāṇa (the chief vital air in the body and the deity presiding over it) through the singing of the udgītha (a part of the sāma hymn). He was the udgātṛ priest in the sacrifice performed by the Naimiśīyas and successfully got them what they wanted.
The Jaminīya Upaniṣad Brāhmaṇa states (1.9.2) that Baka-dālbhya restrained Indra from harming the Ājakeśins (mem-bers of a particular family).
The Vāmanapurāṇa (ch. 39) gives the story of a sage Baka-dālbhya who was about to destroy the kingdom of a ruler, Dhṛtarāṣṭra by name, through a sacrifice. The latter meanwhile realized his mistake—he had slighted the sage once—made amends for the same, pleased the sage and got back all that he had lost.
It is rather difficult to say whether all these Baka-dālbhyas were one and the same. The possibility cannot be ruled out.