[Stuart]

No more than TSB Bank is short for “Trustee Savings Bank Bank” - it hasn’t had trustees for decades. Nor has Ted Turner had anything to do with TCM for a bit.

It happens sometimes, when the original acronym no longer makes sense, but the brand is well established and they don’t want to change it.

TCM is still referred to as 'Turner Classic Movies' with the appropriate wordmark under the logo in the USA and many others. They only added 'Movies' to the logo in some countries. Turner Classic Movies is the name of the subsidiary within WBD which runs all the international channels.

As for the 'Trustee Savings Bank', their name was legally changed in 1986 to 'TSB Scotland', then to 'TSB Bank Scotland' in 1989.  The acronym 'TSB' no longer had any meaning as an abbreviation. When whey were spun off from Lloyds and bought by Sabadell they became just 'TSB Bank plc'.

Not quite the same as operating the same TV channel in different countries with oddly different names within the same subsidiary.