The definition of “Q“ even delivers a message:

Que in Spanish = “What”

Queue = “a job (or part/role) to be performed at a certain time”

Cue = “a signal to begin a speech or action”

Que is “Very Occasionally” searched when people are looking up “Coup” which would most likely help non-native English speakers find the definition of “Coup”.

I think Q is not only his name but also his function:

What part/job/role is to be played at what time (signaled) during this coup.

https://www.merriam-webster.com/dictionary/q