Jonathan was the eldest son of King Saul.
Saul died at the Battle of Mount Giolboa.
Three of Saul's sons: Jonathan, Abinadab, and Malchishua died with Saul at Mount Gilboa.
Ish-bosheth, son of Saul, was proclaimed king of Israel after the slaying of his father and brothers
In the battle of Gilboa, Ish-bosheth reigned for two years.