Heimdall, son of Odin and the nine daughters of Aegir and Ran, called the Billow Maidens or Waves; was guardian of the Bifröst, the Rainbow Bridge which is the closest to come to a "goddess of the rainbow"; either the Bifröst/Heimdall, or the nine Wave/Billow Maidens.
leto was the norse goddess of hunt
The Norse goddess of hearth was Frigga. The Greek goddess of hearth was Hestia.
Iris was the goddess of the rainbow.
A Norse goddess.
Freya is a Norse goddess, not Greek. The Norse people did not have a calendar of mythic events.
Actually there is a Norse Goddess. Niorun is the Goddess of dreams.
There is no Norse goddess of mischief, however there is a Norse god of mischief - Loki. It may be the the asker wishes to know the Norse goddess of the underworld - her name, in fact is Hel, and her domain is also known as Hel (one "l" not two).
Go to www.google.com and type in Norse goddess Thrud.
Freya
Freya
uegir
Freya