Where does “treenighet” come from?
treenighet (Swedish) comes from Swedish treenig, from Swedish tre, from Old Swedish þrir, from Old Norse þrír, from Proto-Norse ᚦᚱᛁᛃᛟᛉ, from Proto-Germanic þrīz, from Proto-Indo-European *tréyes.
treenighet (Swedish): trinity, Trinity
Ancestry of “treenighet”, step by step