Where does “ænti” come from?

ænti (Old Swedish) comes from Old Swedish ængin, from Old Norse engi, from Old Norse einn, from Proto-Germanic ainaz, from Proto-Indo-European óynos — one; single.

Ancestry of “ænti”, step by step

Step	Language	Word	Meaning
1	Old Swedish	ængin	none, no one, nobody
2	Old Norse	engi	none, no one, nothing; no, not any; any
3	Old Norse	einn	one; some, a few
4	Proto-Germanic	ainaz	one; some
5	Proto-Indo-European	óynos	one; single

Every word from Proto-Indo-European óynos →Every word from Proto-Germanic ainaz →Every word from Old Norse einn →