“Lothario" is brilliant*, and of course, calls to mind “Don Juan”. But I don’t think “jinx” fits the OP’s definition.
*the name of the play in which Lothario appears, and that of its author, are so forgettable that I’ve already forgotten them, five minutes after looking them up
(Dr. Techie: I never guessed!!!! Here i was, with an image of you as gaunt, ascetic, frowning --- more Loyola than Gargantua. just goes to show --- one never knows..... ;-) ;-) ;-)
Rowe’s The Fair Penitent (1703), which was an adaptation of an earlier work by the Jacobean dramatist Massinger (although Lothario is Rowe’s creation). Nicholas Rowe was also produced the first modern edition of Shakespeare (as opposed to the Folio editions of the 17th century) which was prefixed by a priceless biography of the poet, preserving facts and traditions which might otherwise have been lost. We owe him a great debt. (I know you looked it up, Lionello, but I have a soft spot for Rowe and couldn’t bear to see him go unmentioned. His Jane Shore isn’t bad, actually, Although his reputation as a dramatist has taken a tumble, his plays were hugely popular in the early 18th century.)
Now for some character names
Stentor (the guy in the Iliad with the stentorian voice)
Pantagruel (Gargantua’s son) - Pantagruelian in OED has as one of its meanings comically inflated, grotesque.
Mrs Grundy (from Speed the Plow, 1798, by Thomas Morton)
Here’s one you dpn’t see much now, Box and Cox. To quote OED
The name of a farce written by J. M. Morton (1811-91) in 1847, in which two characters, John Box and James Cox, occupy the same apartment (the one by day and the other by night); hence applied allusively to an arrangement in which two persons take turns in sustaining a part, occupying a position, or the like.