Hey, octothorp/octothorpe/octotherp was around for many many years before programmers ever started calling it the "hash symbol". It never had been in usage in the USA before you Brits started calling it that.
It was actually called the "pound sign" when I was a kid, meaning weight in pounds (you know, those things you Brits invented, foisted off on us, and then abandoned!). That is, we used to commonly write 37# (pr sometimes #37) meaning 16.8kg.
Anyway, I started programming in the 1960s, so octothorp is appropriate for me!