For Sale: Gios Compact 1987 Columbus Shimano Dura Ace size 57

Absolute can of worms here regarding plurals. Where to start?

1. Borrowed words don't have to retain the plurals from the source language
   
2. Italian plurals are a bit more complex than adding "i" on the end of a word
   
3. I just asked an Italian colleague and proper nouns like Gios wouldn't take a plural marker
   
4. Words with Latin roots have been borrowed into most languages in the world, and so the plurals they take are incredibly varied.
   
   

TL;DR?

Call it what you like :)