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So they basically used the first name that jumped to mind. I thought the names would have described something within the context of the situation, like a sceptic person in the South African ranks or maybe on the other side. I guess people make up all sort of stories. ;)

Nah, I'm pretty sure the codenames are selected as randomly as possible (or at least randomly from a preset list) because they want to avoid using (even by subconscious chance) a codename the enemy can use to predict what they're really up to.