Where does “ᚺᚼᛁᛞᛉ” come from?

ᚺᚼᛁᛞᛉ (Proto-Norse) comes from Proto-Germanic haidraz, from Proto-Indo-European *keyt- — to shine, glow.

ᚺᚼᛁᛞᛉ (Proto-Norse): bright, shining