Where does “sekstetti” come from?

sekstetti (Finnish) comes from French sextette, from Italian sestetto, from Italian sesto, from Latin Sextus, from Latin sex, from Proto-Italic seks, from Proto-Indo-European swéḱs — six.

sekstetti (Finnish): sextet

Definitions

sextet

Ancestry of “sekstetti”, step by step

Step	Language	Word	Meaning
1	French	sextette	—
2	Italian	sestetto	sextet
3	Italian	sesto	sixth; pair of compasses; layout, due place,...
4	Latin	Sextus	particularly popular in Gaul. (Occasionally also found as a cognomen.) In particular
5	Latin	sex	six; 6
6	Proto-Italic	seks	six
7	Proto-Indo-European	swéḱs	six

Every word from Proto-Indo-European swéḱs →Every word from Proto-Italic seks →Every word from Latin sex →