Where does “Kaksoisvirranmaa” come from?

Kaksoisvirranmaa (Finnish) comes from Finnish mää, from Finnish -inen, from Finnish -uus, from Proto-Finnic -uc — -ness, -hood.

Ancestry of “Kaksoisvirranmaa”, step by step

Kaksoisvirranmaa traces back through two separate lines of ancestry.

via Finnish mää

StepLanguageWordMeaning
1Finnishmääbaa; I
2Finnish-inen-like, -ous, -y; -en; Creates adjectives from...
3Finnish-uusForms nouns from adjectives, expressing a quality
4Proto-Finnic-uc-ness, -hood

via Finnish virta

StepLanguageWordMeaning
1Finnishvirtaflow, stream; river; current
2Proto-Finnicvirtastream; flow, current
3Proto-Slavicvьrtъturn, enclosure
Every word from Proto-Finnic -uc →Every word from Finnish -inen →Every word from Finnish -uus →