New Revised Standard Version
Now Absalom had set Amasa over the army in the place of Joab. Amasa was the son of a man named Ithra the Ishmaelite, who had married Abigal daughter of Nahash, sister of Zeruiah, Joab’s mother.

Contemporary English Version
Absalom put Amasa in Joab's place as commander of the army. Amasa's father was Ithra from the family of Ishmael, and his mother was Abigal, the daughter of Nahash and the sister of Joab's mother Zeruiah.

New American Bible
Absalom had put Amasa in command of the army in Joab’s place. Amasa was the son of an Ishmaelite named Ithra, who had married Abigail, daughter of Jesse and sister of Joab’s mother Zeruiah.

Douay-Rheims Bible
Now Absalom appointed Amasa in Joab's stead over the army: and Amasa was the son of a man who was called Jethra, of Jezrael, who went in to Abigail the daughter of Naas, the sister of Sarvia who was the mother of Joab.

Now Absalom appointed Amasa in Joab's stead over the army: and Amasa was the son of a man who was called Jethra, of Jezrael, who went in to Abigail the daughter of Naas, the sister of Sarvia who was the mother of Joab.

Amasa

2 Samuel 19:13 And say ye to Amasa: Art not thou my bone, and my flesh? So do God to me and add more, if thou be not the chief captain of the army before me always in the place of Joab.

2 Samuel 20:4,9-12 And the king said to Amasa: Assemble to me all the men of Juda against the third day, and be thou here present. . . .

Ithra

1 Chronicles 2:16,17 And their sisters were Sarvia, and Abigail. The sons of Sarvia: Abisai, Joab, and Asael, three. . . .

Jether the ishmaelite

1 Chronicles 2:13,16 And Isai begot Eliab his firstborn, the second Abinadab, the third Simmaa, . . .