"Unexpectedly named after people". Erlang seems to be short for for Ericsson Language, Elo is often misspelled ELO as if it stands for something. Shrapnel is less unexpected.
And yes I am a great party guest!
Sadism and masochism - perhaps less unexpected, but no less than shrapnel IMO.
Sousaphone is another -phone that's pretty obviously named after a person. Less well known but still pretty obvious are rothphone, heckelphone, sarrusophone, sudrophone.