Scandinavian form of Eric. This was the name of kings of Sweden, Denmark and Norway. King Erik IX of Sweden (12th century) is the patron saint of that country.
From the Hebrew name יְהוֹנָתָן (Yehonatan), contracted to יוֹנָתָן (Yonatan), meaning "Yahweh has given", derived from the roots יְהוֹ (yeho) referring to the Hebrew God and נָתַן (natan) meaning "to give". According to the Old Testament, Jonathan was the eldest son of Saul. His relationship with his father was strained due to his close friendship with his father's rival David. Along with Saul he was killed in battle with the Philistines.
As an English name, Jonathan did not become common until after the Protestant Reformation. A famous bearer was the Anglo-Irish satirist Jonathan Swift (1667-1745), who wrote Gulliver's Travels and other works.