The Society for the Prevention of Calling Sleeping Car Porters "George" (SPCSCPG) was founded as a joke by lumber baron George W. Dulany in 1914.
The appellation may have stemmed from the name of George Pullman of the Pullman Company, which at one time manufactured and operated a large proportion of all the sleeping cars in North America.
Porters were almost exclusively Black, and the practice presumably derived from the old custom of naming slaves after their masters, in this case porters being regarded as servants of George Pullman.
In 1926, the SPCSCPG persuaded the Pullman Company to install small racks in each car, displaying a card with the given name of the porter on duty.
Of the 12,000 porters and waiters then working for Pullman, only 362 turned out to be named George.