26. This name for a wanton seducer of women originated as a character in Nicholas Rowe's 1703 play "The Fair Penitent".
From Quiz Eponymous Literary Characters
Answer:
lothario
Rowe (1674-1718) was a poet laureate of England (he succeeded Nahum Tate in 1715) and the leading tragic dramatist of his era (his one comedy, "The Biter", was a failure). His 6 volume edition of "The Works of Mr. William Shakespear; Revis'd and Corrected" (1709) was the first critical edition of Shakespeare's works; it was expanded to 9 volumes in 1714 to include the poems. Rowe's tragedies include "Tamurlane", "Lady Jane Grey", and "The Ambitious Stepmother", as well as "The Fair Penitent".
The plot of "The Fair Penitent" is motivated by the seduction of the heroine, Calista, by her lover Lothario. Calista, the daughter of a Genoese nobleman, was in love with Lothario; after surrendering her virtue to him, she begs him to marry her, to no avail. Her father, meanwhile, has arranged for her marriage to the noble Altamont. Altamont is presented with evidence of his wife's infidelity, but refuses to believe the truth until he catches the lovers together. He kills Lothario in a fit of passion, which touches off a vendetta by the latter's faction in which Calista's father is killed. Distraught over the deaths of her father and lover, Calista commits suicide. The name "Lothario" has entered the lexicon, along with Don Juan, as the prototype of a heartless and uncaring seducer.