What is "jehan"

Jean Marie Cayrecastel better known as Jehan (stylized as JeHaN) (born in Montluçon in 1957) is a French songwriter and singer. He is one of the last itinerant songwriter from the Midi with uninterrupted Trouvère (i.e. French-Speaking Troubadour) tradition.

Jehan is a male given name. It is the old orthography of Jean in Old French, and is rarely given anymore.