Jonathan, but you were close you probably were smart enough to try qouting it to see the URL.
Jon and John have completly different origins
JOHN
Gender: Masculine
Usage: English, Biblical
Pronounced: JAHN [key]
English form of Iohannes, which was the Latin form of the Greek name Ιωαννης (Ioannes), itself derived from the Hebrew name יוֹחָנָן (Yochanan) meaning "YAHWEH is gracious". This name owes its consistent popularity to two New Testament characters, both highly revered as saints. The first was John the Baptist, the forerunner of Jesus Christ and a victim of beheading by Herod Antipas. The second was the apostle John, also supposedly the author of the fourth Gospel and Revelation. The name has been borne by 23 popes and eight Byzantine emperors, as well as kings of England, France, Sweden, Denmark, Poland, Portugal and Hungary. It was also borne by the poet John Milton and the philosopher John Locke.
JONATHAN
Gender: Masculine
Usage: English, German, Scandinavian, Biblical
Pronounced: JAHN-a-than (English), YO-nah-tahn (German) [key]
From the Hebrew name יְהוֹנָתָן (Yehonatan) (contracted to יוֹנָתָן (Yonatan)) meaning "YAHWEH has given". In the Old Testament Jonathan was the eldest son of Saul and a friend of David. He was killed in battle with the Philistines. A famous bearer of this name was Jonathan Swift, the satirist who wrote 'Gulliver's Travels' and other works.