Origin of illustrious
Examples from the Web for illustriously
He is the present chieftain of the McGregor clan, which figures so illustriously in the history of Scotland.The Anti-Slavery Examiner, Omnibus|American Anti-Slavery Society
He fell conspicuously, illustriously, between the reviewers who reviled him, and the public who would have none of him.The Creators|May Sinclair
Word Origin for illustrious
1560s, from Latin illustris "lighted, bright, brilliant;" figuratively "distinguished, famous," probably a back-formation from illustrare "embellish, distinguish, make famous" (see illustration). Sometimes also illustrous. Replaced illustre in same sense (mid-15c.), from Middle French illustre.