Old Norse regnbogi

← Proto-Germanic *regnabugô (inherited)

← Old Norse regn (compound)

← Old Norse bogi (compound)

→ Old English regnboga (cognate)

→ Danish regnbue (derived)

→ Icelandic regnbogi (inherited)

→ Norwegian Bokmål regnbue (derived)

→ Norwegian Bokmål regnboge (derived)

→ Norwegian Nynorsk regnboge (derived)

→ Swedish regnbåge (derived)