Son of King Saul and one of the most celebrated examples of friendship in Scripture. Despite his father's enmity toward David, Jonathan made a covenant of friendship with David. He defended David before Saul and warned him of threats to his life. He died alongside his father and brothers in the battle of Jezreel, mourned deeply by David.
Saul chose him three thousand men of Israel; whereof two thousand were with Saul in Michmash and in mount Beth-el, and a thousand were with Jonathan in Gibeah of Benjamin: and the rest of the people he sent every man to his tent.1 Samuel 13:2, KJV
1 Samuel 14:6
And Jonathan said to the young man that bare his armour, Come, and let us go over unto the garrison of these uncircumcised: it may be that the LORD will work for us: for there is no restraint to the LORD to save by many or by few.1 Samuel 14:6, KJV
1 Samuel 18:3
Then Jonathan and David made a covenant, because he loved him as his own soul.1 Samuel 18:3, KJV
1 Samuel 20:41
And as soon as the lad was gone, David arose out of a place toward the south, and fell on his face to the ground, and bowed himself three times: and they kissed one another, and wept one with another, until David exceeded.1 Samuel 20:41, KJV
1 Samuel 23:16
And Jonathan Saul’s son arose, and went to David into the wood, and strengthened his hand in God.1 Samuel 23:16, KJV
2 Samuel 1:26
I am distressed for thee, my brother Jonathan: very pleasant hast thou been unto me: thy love to me was wonderful, passing the love of women.2 Samuel 1:26, KJV
See how Jonathan connects to every other figure in Scripture.