Strong's #293: 'Achiyno`am (pronounced akh-ee-no'-am)
 from 251 and 5278; brother of pleasantness; Achinoam, the name of two Israelitesses:--Ahinoam.
Brown-Driver-Briggs Hebrew Lexicon:
 
  'ăchı̂ynô‛am 
 
 Ahinoam = "my brother is delight" 
 1) wife of Saul, daughter of Ahimaaz
 2) wife of David, mother of Amnon, a Jezreelitess
 
  Part of Speech: noun proper feminine
Relation: from H251 and H5278
Usage:
This word is used 7 times:
1 Samuel 14:50: "And the name of Saul's wife  was Ahinoam, the daughter of Ahimaaz: and the name of the captain"
1 Samuel 25:43: "David also took  Ahinoam and they were also both"
1 Samuel 27:3: "even David with his two wives,  Ahinoam the Jezreelitess, and Abigail the Carmelitess, Nabal's"
1 Samuel 30:5: "two wives  Ahinoam the Jezreelitess, and Abigail the wife of Nabal"
2 Samuel 2:2: "wives also,  Ahinoam the Jezreelitess, and Abigail Nabal's wife"
2 Samuel 3:2: "and his firstborn was Amnon,  of Ahinoam the Jezreelitess;"
1 Chronicles 3:1: "unto him in Hebron; the firstborn Amnon,  of Ahinoam the Jezreelitess; the second Daniel, of Abigail"