Holiness

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Old English hālignes (see holy, -ness).

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From Middle English holynesse, holinesse, halinesse, from Old English hāliġnes(“holiness, a holy thing, rites”), equivalent to holy +‎ -ness.

etymonline

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holiness (n.)

Middle English holinesse, from Old English halignis "state or character of being holy, sanctity, religion; holy thing;" see holy + -ness. Compare Old High German heilagnissa. As title of the Pope (mid-15c. in English), it translates Latin sanctitas (until c. 600 also applied to bishops).