Where does “siæxtān” come from?

siæxtān (Old Swedish) comes from Old Norse sextán, from Proto-Germanic sehstehun, from Proto-Germanic tehun, from Proto-Indo-European déḱm̥t — ten.

Ancestry of “siæxtān”, step by step

Step	Language	Word	Meaning
1	Old Norse	sextán	sixteen
2	Proto-Germanic	sehstehun	sixteen
3	Proto-Germanic	tehun	ten
4	Proto-Indo-European	déḱm̥t	ten

siæxtān — Etymology, Origin & Word History | Etymology Explorer