Somadatta

O Sanjaya, also salute the wise chief of the Vahlikas, who always cherishes no other wish save that there should be peace among the Bharatas. I think, thou shouldst also worship that Somadatta who is endued with numerous excellent qualities, who is wise and possesses a merciful heart, and who from his affection for the Kurus always controls his anger towards them. The son of Somadatta is worthy of the greatest reverence among the Kurus. He is my friend and is a brother to us. A mighty bowman and the foremost of car-warriors, he is worthy in all respects. Thou shouldst, O Sanjaya, enquire after his welfare along with that of his friends and counsellors.
The Mahabharata, Book 5: Udyoga Parva: Section XXX
Somadatta fought against Sātyaki and Bhīmasena in the battle of Bhārata and fell down unconscious. (Droṇa Parva, Chapter 157, Verse 10).
(vi) In the battle which followed this, Sātyaki killed Somadatta. (Mahābhārata Droṇa Parva, Chapter 162, Verse 33).
https://www.wisdomlib.org/hinduism/compilation/puranic-encyclopaedia/d/doc241965.html
“The mighty car-warrior Somadatta, then, who was endued with great strength taking up another bow, began to cover Satyaki (with showers of shafts). Satyaki too, inflamed with rage, pierced Somadatta p. 372 with many shafts. Somadatta, in return, afflicted Satyaki with his arrowy showers. Then Bhima coming to the encounter, and fighting on behalf of Satyaki, struck Valhika’s son with ten shafts. Somadatta, however, fearlessly struck Bhimasena with many whetted arrows….
Then Satyaki, O king, with a broadheaded arrow, cut off in that encounter Somadatta’s bow, and then with five arrows, the leathern fence that cased his fingers. Then, O Bharata, with four other shafts he speedily despatched the four excellent steeds of the Kuru warrior to Yama’s presence. And then that tiger among car-warriors with another straight shaft, smiling the while, cut off from his trunk the head of Somadatta’s driver. Then he sought at Somadatta himself a terrible shaft of fiery effulgence, whetted on stone, steeped in oil, and equipped with wings of gold. That excellent and fierce shaft, shot by the mighty grandson of Sini, quickly fell like a hawk, O Lord, upon the chest of Somadatta. Deeply pierced by the mighty Satwata, the great carwarrior Somadatta, O monarch, fell down (from his car) and expired.
” – The Mahabharata, Book 7: Drona Parva: Ghatotkacha-badha Parva: Section CLXI