SB 1.9 - Vyāsadeva, Bṛhadaśva and Bharadvāja
Some of the great souls who accompanied Yudhiṣṭhira to see Bhīṣma:
Vyāsadeva - He is known as Kṛṣṇa, Kṛṣṇa-dvaipāyana, Bādarāyaṇa etc. He was the son of Parāśara in the womb of Satyavatī prior to her betrothal with Śantanu, the father of Bhīṣma. Vyāsa is an incarnation of Nārāyaṇa and he is offered respects before one chants the Vedic literature, especially the Purāṇas. Śukadeva Gosvāmī was his son. He is the author of Mahābhārata and the Bhāgavatam. The Vedānta Sūtras were compiled by him. By the order of his mother, Satyavatī and by the request of Bhīṣma, he begot three brilliant sons – Dhṛtarāṣṭra, Pāṇḍu and Vidura. His Mahābhārata, which was complied after the battle of Kurukṣetra was first spoken in the royal assembly of Janamejaya, the son of Parīkṣit.
Bṛhadaśva – An ancient sage who first met Yudhiṣṭhira at Kāmayavana, and who used to meet the king now and then. He narrated the story of Nala.
Bharadvāja – One of the seven great ṛṣis. He was present at the time of the birth of Arjuna. While taking bath in the Ganges, he met the beautiful heavenly girl Ghṛtacī and discharged semen, which was kept and preserved in an earthen pot and from which Droṇa was born. Some say that the father of Droṇa was a different Bharadvāja. Once he approached Droṇa and requested him to stop the battle of Kurukṣetra.