English word loyalty comes from Old French (842-ca. 1400) loialte

Detailed word origin of loyalty

Dictionary entry	Language	Definition
loialte	Old French (842-ca. 1400) (fro)
*loialte	Middle English (1100-1500) (enm)
loyalty	English (eng)	Faithfulness or devotion to some person, cause or nation.. The state of being loyal; fidelity.