Johan m, f
1 (m.) Scandinavian and Low German form of JOHN (SEE John). It is also used as a more learned Czech form of the name, a doublet of JAN (SEE Jan).
2 (f.) Older Scottish spelling of JOAN (SEE Joan), which was traditionally pronounced as two syllables.
Pet forms (of 1): Low German: Hanke. Czech: Hanuš.
First names dictionary. 2012.