Mentioned in the Bible by name

Amasa

And Absalom had appointed Amasa over the army instead of Joab. Amasa was the son of a man named Itra, an Israelite who had gone in to Abigail (Hebr. Avigal) [short form of Abigail], the daughter of Nahash, the sister of Zeruiah, the mother of Joab.

And say to Amasa, 'Are you not my bone and my flesh? May God (Elohim) do so to me and more also, if you do not become commander of the army before me in place of Joab forever.

And the king said to Amasa, "Summon the men of Judah within three days, and be here yourself."

And Amasa went and gathered the men of Judah, but he delayed beyond the time that was appointed for him.

When they were at the great stone which is in Gibeon, Amasa came out to meet them. And Joab was girded with his armor which he had put on, and there was a belt with a sword fastened to his hip in its sheath, and as he went forward it fell out.

And Joab said to Amasa, "Shalom (are you well), my brother." And Joab took Amasa by the beard with his right hand to kiss him.

But Amasa did not think about the sword in Joab's hand, and he struck him in the groin with it, and his entrails came out, and he did not strike him again, and he died. And Joab and his brother Avishai pursued Sheba, the son of Bichri.

And Amasa lay writhing in his blood in the middle of the highway. And when the man saw that all the people stood still, he [the man who spoke in verse 11] carried Amasa away from the highway into the field and threw a cloak over him, because he saw that all who came upon him stood still.

And you [Solomon] also know what Joab, the son of Zeruiah, did to me—how he struck down (killed) two of Israel's commanders, Abner, the son of Ner [2 Sam. 3:22–39], and Amasa, the son of Jether [2 Sam. 20:8–10]. In times of peace, he struck them down as if in battle; when he shed their blood as in battle, he stained his belt around his hips and his sandals on his feet. [The words used for belt and sandals in this verse are never used in war (2 Sam. 18:11), which reinforces that the killing did not take place in a battle context.]

And the Lord (Yahweh) will return his blood upon his own head, because he struck down two men who were more righteous and better than he, and he killed them with the sword, and my father David did not know it. Abner, the son of Ner, commander of Israel [2 Sam. 3:22–39], and Amasa, the son of Jether, commander of Judah [2 Sam. 20:8–10].