National?

This might be a silly question
But why is the SANFL the SANFL and not the SAFL or SAFA etc etc?
There must be a historical reason at some point. What is a marketing ploy for a national competition at some point?
But why is the SANFL the SANFL and not the SAFL or SAFA etc etc?
There must be a historical reason at some point. What is a marketing ploy for a national competition at some point?