A modern name popularized in literature, derived from English Ren and the -ly ending as a stylish personal variant.
R. Martin, who introduced Renly Baratheon in his epic fantasy series "A Song of Ice and Fire," beginning with "A Game of Thrones" (1996). Martin has noted drawing on medieval English place name and surname conventions — names ending in "-ley" or "-ly" were common in the English aristocratic tradition — to give his fictional nobility a sense of historical texture without literal historicity.
Renly thus sounds plausibly ancient without corresponding to any documented historical figure. In the series, Renly Baratheon is a charismatic, politically savvy lord whose popularity among the common people and the knightly class makes him a compelling claimant to the Iron Throne. His portrayal in both the novels and the HBO television adaptation (2011-2019) — where he was played with charm and warmth by Gethin Anthony — associated the name with qualities of magnetism, idealism, and a certain tragic beauty.
His storyline also made Renly one of the most prominent gay characters in mainstream fantasy, lending the name additional cultural significance. Parents choosing Renly today are often drawn to its ease on the ear: two syllables, a strong opening consonant, a soft ending. It follows the contemporary appetite for surname-style given names while carrying the particular prestige of fantasy literature. Like Arya, Bran, and Sansa before it, Renly demonstrates how powerfully a well-written character can transform an invented sound into a name families want to pass on.