Where does “cavalleria” come from?

cavalleria (Catalan) comes from Catalan cavaller, from Late Latin caballarius, from Latin caballus, from Proto-Celtic kaballos — horse.

cavalleria (Catalan): cavalry

Definitions

Step	Language	Word	Meaning
1	Catalan	cavaller	knight
2	Late Latin	caballarius	horseman
3	Latin	caballus	horse; nag; pack-horse, jade, hack
4	Proto-Celtic	kaballos	horse

cavalleria — Etymology, Origin & Word History | Etymology Explorer