1 Samuel 31:2

Jonathan — David's dear friend; God so ordering it for the farther exercise of David's faith and patience; and that David might depend upon God alone for his crown, and receive it solely from him, and not from Jonathan; who doubtless, had he lived, would have speedily settled the crown upon David's head. There was also a special providence of God, in taking away Jonathan, (who of all Saul's sons, seems to have been the fairest for the crown) for preventing divisions, which might have happened amongst the people concerning the successor: David's way to the crown being by this means made the more clear. Abinadab — Called also Ishui, 1 Samuel 14:49. Ishbosheth was not here, being possibly at home for the management of affairs there.