Where does “kaksosveljekset” come from?

kaksosveljekset (Finnish) comes from Finnish veljes, from Finnish Veli, from Proto-Finnic velji, from Proto-Germanic swelijō, from Proto-Indo-European swé — self.

kaksosveljekset (Finnish): twin brothers collective term for people who are each other's twin brothers

Definitions

twin brothers collective term for people who are each other's twin brothers

Ancestry of “kaksosveljekset”, step by step

kaksosveljekset traces back through two separate lines of ancestry.

via Finnish veljes

Step	Language	Word	Meaning
1	Finnish	veljes	brother; Alternative form of veljesi
2	Finnish	Veli	brother
3	Proto-Finnic	velji	brother
4	Proto-Germanic	swelijō	sister's husband
5	Proto-Indo-European	swé	self

via Finnish kaksonen

Step	Language	Word	Meaning
1	Finnish	kaksonen	A twin; When used as modifier in compound terms...
2	Finnish	kaksi	two
3	Proto-Finnic	kakci	two
4	Proto-Uralic	*kakta	—

Every word from Proto-Indo-European swé →