Graciously

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Middle English: via Old French from Latin gratiosus, from gratia ‘esteem, favour’ (see grace).

wiktionary

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From Middle English graciously, graciousliche; equivalent to gracious +‎ -ly.

etymonline

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graciously (adv.)

c. 1300, "by God's grace," from gracious + -ly (2). Meaning "favorably, with good will" is late 14c.