Ahinoam is the name of two women: the daughter of Ahimaaz and wife of Saul, and a woman from Jezreel who became David’s wife and mother of Amnon.
Saul’s wife Ahinoam was the mother of his children in the royal household. David’s Ahinoam was his wife during the period before his reign at Hebron and was the mother of his first son, Amnon.
The name means “my brother is pleasantness,” “brother of pleasantness,” or “brother of grace.” David’s Ahinoam is repeatedly mentioned with Abigail, another of his wives.