One of the mysteries of the English language finally explained.
That owes or gives allegiance (to someone or something); loyal, faithful.
A person who owes or gives allegiance; a loyal follower or adherent (of someone or something).
Mid 16th century; earliest use found in John Heywood (c1496–c1578), playwright and epigrammatist. From allegi- + -ant, by analogy with other adjectives and nouns in -ant corresponding to nouns in -ance.
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