Old Norse gjarna

← Proto-Germanic *gernô (inherited)

← Proto-Germanic *gernaz (mention)

← Proto-Indo-European *ǵʰer- (root)

← Proto-Indo-European *ǵʰer- (derived)

← Old Norse gjarn (cognate)

→ Danish gerne (derived)

→ Norwegian Bokmål gjerne (derived)

→ Norwegian Nynorsk gjerne (derived)

→ Swedish gärna (derived)