Where does “sobna” come from?

sobna (Norwegian Nynorsk) comes from Old Norse sofna, from Swedish sova, from Old Swedish sova, from Old Norse sofa, from Proto-Germanic swefaną, from Proto-Indo-European swep- — to sleep.

Ancestry of “sobna”, step by step

StepLanguageWordMeaning
1Old Norsesofnato fall asleep
2Swedishsovato sleep
3Old Swedishsovato sleep
4Old Norsesofato sleep
5Proto-Germanicswefanąto sleep
6Proto-Indo-Europeanswep-to sleep
Every word from Proto-Indo-European swep- →Every word from Proto-Germanic swefaną →Every word from Old Norse sofa →