Origin of the name Johan:

Cognate of John (God is gracious), which is from the Middle Latin Johannes, an evolution of the Ecclesiastic Late Latin Joannes. Joannes is from the Greek Iōannes, a derivative of the Hebrew Yehanan, a short form of Yehohanan, which is from yehōhānān (Yahweh is gracious). The name, borne by several important biblical characters, was also borne by many saints, twenty-three popes, and many kings throughout Europe.

From A World of Baby Names by Teresa Norman.Buy the book