Where does “þy” come from?
þy (Old Swedish) comes from Old Norse því, from Proto-Germanic *sa, from Proto-Austronesian *əsa, from Proto-Oceanic *isa.
Ancestry of “þy”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Old Norse | því | dative singular of þat; therefore, for that... |
| 2 | Proto-Germanic | *sa | — |
| 3 | Proto-Austronesian | *əsa | — |
| 4 | Proto-Oceanic | *isa | — |