In the short story "The Writer's Child" by Tad Williams—collected in the short story anthology The Sandman: Book of Dreams edited by Neil Gaiman and Ed Kramer—Byron is depicted as reincarnated as a child's teddy bear. Described as "clubfoot" for having one leg shorter than the other, and called separately, "young lord" and simply "Byron", it is not til late in the story that he's revealed to be paying penalty for some kind of crime involving a woman named, "Ogusta". -Wikipedia

". . . long out-of-print, follows Kate and William Blake's 'mad' marriage and immersion in 'The Learning.' Portrays meetings among W. Blake, Paine, Godwin, and Wollstonecraft at Joseph Johnson's. Recasts Blake's allegories as time-travel, simplifying some, of course. . . . But my students and I enjoy my xeroxed copy--it speaks to feminists, historicists, and allegorians (?) alike." —N. Sweet

"Venetia is a minor novel by Benjamin Disraeli, published in 1837, the year he was first elected to the House of Commons. The novel is a lightweight romantic fantasy. A contemporary reviewer, writing in an 1854 issue of the New Monthly Review, declared that he 'liked it least of all Disraeli’s works,' [elaborating]: 

"An alternate reality story set in a universe where Byron didn't have a club foot. The story is told from Mary Shelley's point of view, shows Byron as a war hero (he helped defeat Napoleon!) who's just been created The Marquess of Newstead, and gives a different inspiration for Frankenstein." —J. Leys

"Ozymandias (real name Adrian Alexander Veidt) is a fictional character in the acclaimed graphic novel miniseries Watchmen by Alan Moore and Dave Gibbons, published by DC Comics....His name recalls the famous poem by Percy Bysshe Shelley, which takes as its theme the fleeting nature of empire and is excerpted as the epigraph of one of the chapters of Watchmen." -Wikipedia

Watchmen was also adapted into a film, directed by Zack Snyder, in 2009.

The poem "Who Was Mary Shelley" by Lorine Niedecker references Mary and Percy Shelley and Lord Byron.

The Jadawin family (or at least their names) are taken from William Blake's mythology. This mythology is referred to by the characters in the stories (mainly in The Gates of Creation, Red Orc's Rage, and More than Fire). -Wikipedia