This isn't really about Hitman, but I thought it was worth mentioning purely because it is a weird coincidenence.
In the Gerry Anderson programme, Thunderbirds - now currently running as a CGI TV show by Weta Workshop called Thunderbirds are Go - International Rescue is a secret organisation that uses their extremely high tech Thunderbird vehicles to carry out life saving operations that no other rescue organisation is capable of dealing with.
Because this was made in the 1960's, the organisation had to be kept secret at all costs, because, well, every other show running had to keep their secrets too, unlike with Marvel movies today where very few people really stay secret. Now in the show, to help keep IR secret, they frequently used Lady Penelope for most episodes, but in 1 episode and never to mentioned ever again outside of it, it is revealed that over hundred agents to keep the organisation safe.
In the episode The Impostors, Jeremiah Tuttle, an American hill billy who is also an airforce veteran is dispatched to help with the episode's plot. And would you like to guess what Jeremiah's Agent number is?
Just a fun little coincidence, from a show made over 30 years before the first Hitman game.