All these years I had not a clue why The Oklahoma NCAA college football team added er to Soon to form their name Sooner. So leave it to the Aleks Trebek’s, gift to the United States, game show to clue me in literally.
The answer(clue) was on April 22, 1889 a bugle for a land run sounded in the new Oklahoma territory; those who entered early were dubbed(labeled) this. So this begs another question; What is a land run? A land run is a public opportunity to acquire land conducted by the governing entity in which previously restricted land of the United States was freed up to homestead on a first arrival basis.
So first arrival basis no doubt favor those who arrive Sooner!