ITHRA ĭth’ rə (יִתְרָ֣א). The father of Amasa, who led Absalom’s rebel army. He was married to Abigail, David’s sister (1 Chron 2:17). He is called Ithra the Israelite in 2 Samuel 17:25 (KJV, ASV), but Jether the Ishmaelite in 1 Chronicles 2:17.