Merab
Easton's Dictionary
Increase, the eldest of Saul’s two daughters (1 Sam. 14:49). She was betrothed to David after his victory over Goliath, but does not seem to have entered heartily into this arrangement (18:2, 17, 19). She was at length, however, married to Adriel of Abel-Meholah, a town in the Jordan valley, about 10 miles south of Bethshean, with whom the house of Saul maintained alliance. She had five sons, who were all put to death by the Gibeonites on the hill of Gibeah (2 Sam. 21:8).
Smith's Dictionary
(increase), eldest daughter of King Saul. (1 Samuel 14:49) In accordance with the promise which he made before the engagement with Goliath, ch. (1 Samuel 17:25) Saul betrothed Merab to David. ch. (1 Samuel 18:17) Before the marriage Merab’s younger sister Michal had displayed her attachment for David, and Merab was then married to Adriel the Meholathite to whom she bore five sons. (2 Samuel 21:8)