←
Proto-Germanic *þas (inherited)←
Proto-Germanic *sa (mention)←
Proto-Indo-European *tósyo (inherited)←
Proto-Indo-European *só (mention)→
Westrobothnian diss (inherited)→
Icelandic þess (inherited)→
Norwegian Bokmål dess (derived)→
Norwegian Nynorsk dess (inherited)→
Norwegian Nynorsk tess (mention)