Today I learned that the initial C used to denote the head honcho at the [UK] secret intelligence service[s] - while being explained in latter days as standing for 'chief' - is actually historically an abbreviation of 'Cumming'.

I feel that vital point of trivia this should be on the brochure, and in fact am rather tempted to make the necessary amendments.

ref. https://en.wikipedia.org/wiki/Mansfield_Smith-Cumming