Many aircraft manufacturers give names to the aircraft models. Piper had the Cub, Super Cub, and all the Comanche/Cherokee/Navajo/etc. names used in branding. Cessna has the Skyhawk, Skylane, etc.
Did Waco aircraft use anything other than the three-letter names for branding?
Edit: I am wondering about the original WACO aircraft, not the company that produces reproductions today.