the.com/allegiance

means A sworn, binding loyalty to a nation, ruler, or cause — devotion that comes with obligations attached.

from From Old French 'ligeance,' meaning the status of a liege subject bound to a lord, rooted in 'lige' (liege). The 'al-' at the front crept in later, likely by confusion with the unrelated word 'allegation' — a case of two Latin-adjacent words bleeding into one spelling. So the word's very shape carries a small accidental history: loyalty, with a legal typo baked in.