Heidrun (Heiðrún) in Icelandic is an Old Norse name.
heið means "clear, bright"
rún means "mystery, secret"
In the Edda-saga (the Nordic myth) Heiðrún is the name of the goat who stands on the roof of Valhall. Instead of milk she produces mead
for the warriors of
Odin.
In Sweden the name is pronunced hEYd-run (the u is pronunced like a French U or like a
German Ü)
In Denmark the name is pronunced hEYd-roon or hIGHd-roon
In Germany the name is pronunced hIGHd-roon
In Iceland the name is pronunced hEYdh-roon