Might be a case for OpenHistoricalMap!
I think I’ll take a stab at it here in Västerbotten, using boundary=administrative and admin_level=8 on the grounds that they’re de jure parts of Sweden (at the moment) and their administrative authorities are less than the municipalities. If someone feels strongly otherwise, let me know.
I’ll use their own preferred names as name=*, for example “Ubmeje tjeälddie”, and maybe alt_name=* or name:sv=* if there’s a Swedish alternative name. I also see there’s name:sju=* for Ume Sámi - amazing! That’s also useful for signage.
All this comes about from me wondering what sameby my summer house is within, and getting it wrong.