Coronation

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late Middle English: via Old French from medieval Latin coronatio(n- ), from coronare ‘to crown, adorn with a garland’, from corona (see crown).

wiktionary

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From Middle English coronacion, coronacioun, borrowed from Anglo-Norman coronacion, coronation, from coroner or from Late Latin coronatio, coronationem, from Latin corono.

etymonline

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coronation (n.)

"act or ceremony of investing (a sovereign) with a crown," c. 1400, coronacioun, from Late Latin coronationem (nominative coronatio) "a crowning," noun of action from past-participle stem of Latin coronare "to furnish with a crown," from corona "crown, wreath" (see crown (n.)).