I'm reminded of the 'Tom Formal' that took place whilst I was at university:

> Last night, February 3rd 2011, saw 100 students and fellows all sharing the name of Tom, gather together in a record-breaking charity event in Sidney Sussex dining hall. [...] For £20, Cambridge students with the name "Tom, Thomas, Tommy (or another legitimate variation)" were able to attend a black-tie, three-course formal dinner

https://www.varsity.co.uk/news/3192

Hah this reminds me of a site I built for April 1, 2019 http://www.mynamecon.com

I saw an ad once for a convention of Bobs, with a keynote speech from Bob Newhart and the Jamaican bobsled team as special guests.