Which of Job's three friends was called the Shuhite?

Answer: Bildad

Bildad the Shuhite came with Eliphaz and Zophar to comfort Job (Job 2:11); his first speech begins in Job 8.

“Now when Job’s three friends—Eliphaz the Temanite, Bildad the Shuhite, and Zophar the Naamathite—heard about all this adversity that had come upon him, each of them came from his home, and they met together to go and sympathize with Job and comfort him. Then Bildad the Shuhite replied:”— Job 2:11, 8:1 (BSB)