Where does “rusthollari” come from?

rusthollari (Finnish) comes from Swedish rusthållare, from Swedish hållare, from Swedish -are, from Old Swedish -are, from Old Norse -ari, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

Ancestry of “rusthollari”, step by step

StepLanguageWordMeaning
1Swedishrusthållarean owner of a farm that got tax subsidies for providing the crown with a horseman
2Swedishhållarea holder, a stand, a mount
3Swedish-areRegular construction of comparative: ful →...
4Old Swedish-area suffix used to create agent nouns from verbs; such as væriare, from væria
5Old Norse-aria suffix used to create agent nouns from verbs;...
6Latin-āriuser
7Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)
Every word from Proto-Italic *-āziosEvery word from Latin -āriusEvery word from Swedish -are