←
West Frisian ûle (cognate)
←
Proto-Germanic *uwwô (mention)
←
Proto-Germanic *ūfaz (mention)
←
Proto-Germanic *ūfǭ (mention)
←
Proto-Indo-European *up- (derived)
←
Icelandic ugla (cognate)
←
Old Norse ugla (derived)
←
Swedish uggla (cognate)
→
Icelandic ugla (cognate)
→
Swedish uggla (cognate)