History of the Cleveland Cavaliers
The Cleveland Cavaliers first began play in the NBA in 1970 as an expansion team under the ownership of Nick Mileti. Jerry Tomko, the father of future Major League Baseball pitcher Brett Tomko, submitted the winning entry to name the team the "Cavaliers" through a competition sponsored by The Plain Dealer; supporters preferred it to "Jays", "Foresters" and "Presidents".
Source: Wikipedia — History of the Cleveland Cavaliers (CC BY-SA 4.0)