"Variant of Giovanni"
The name Giovan is commonly a male name from the "Italian" origin.
Giovan is an Italian shortened form of Giovanni, the Italian equivalent of John. It is most often found as the first element of compound given names, such as Giovan Battista and Giovan Pietro, rather than as a standalone name. The shortened form is documented in Italian naming practice well before its first appearance in United States birth records.
Giovanni means "God is gracious".
The pronunciation of Giovan is joh-VAHN.