Meaning of allegiancy in English:
allegiancy
Pronunciation /əˈliːdʒ(ə)nsi/
noun
Allegiance. Later also: loyalty; support.
Recorded earliest in oath of allegiancy.
Origin
Late 16th century; earliest use found in Raphael Holinshed (c1525–?1580), historian. Alteration of allegiance see -ancy.