Torvalds is a Swedish name (Linus Torvalds is from a Swedish Finn family) and it seems to originate as the genitive (possessive) of the name Torvald https://en

Torvalds is a Swedish name (Linus Torvalds is from a Swedish Finn family) and it seems to originate as the genitive (possessive) of the name Torvald https://en.wiktionary.org/w/index.php?title=Torvald https://en.wiktionary.org/w/index.php?title=Torvald I think this use of the genitive is a form of patronymic, like if someone named Torvald had a son named Einar, maybe that person could be called "Einar Torvalds" (that is, Torvald's Einar). So it should probably have a Swedish plural https://en.wikipedia.org/wiki/Swedish_grammar#Plural_forms https://en.wikipedia.org/wiki/Swedish_grammar#Plural_forms I'm not sure which declension it should belong to as a name (and I'll ask a friend to speculate), but the possibilities there seem to be Torvaldsor, Torvaldser, and Torvaldsar. There are no Latin plurals in -i when the nominative form doesn't end in -us or -um. If you make a Latin plural of Torvalds, it would probably be third declension and something like Torvaldes (compare urbs 'city', urbes 'cities'), unless the consonants change in the oblique cases.