Joesph…we may be both Americans and Brits here, but the English language got this word from French.
Cheval>>>>horse
Chevalier>>>>>>Knight
Chevalerie>>>>>Chivalrie
From 1066 England was ruled by the Norman French (William the Conqueror)
The language of court and the upper classes was French, the peasantry spoke Anglo-Saxon tongues.
Modern British English developed as a language with parallel word from French and Anglo-Saxon English.
Chicken–English, Poultry–from French Poulet
As often stated the Americans and Brits are separated by a common language. Our first floor is at the entry, theirs is up a full flight.