WIth so many nodes devoted to
Elvi or
Elvii around here, you might appreciate this one:
In Steven Pinker's book Words and Rules (1999, Basic Books), he cites (p. 56) a story from The New Republic on December 12, 1994: In Las Vegas, The Flying Elvi sued The Flying Elvises for trademark infringement. Both groups were skydivers who would wear Elvis Presley costumes and dance and pretend to sing upon landing.
(Pinker's point is related to irregular plurals, and the way that people sometimes extend not only the regular plural rule but also irregular plural "rules" to new words. A few pages earlier he mentions VAXen and the like.)