The F-22 that took down China's surveillance balloon used the call sign 'FRANK01' in an homage to a heroic pilot from WWI, Frank Luke Jr., who shot down 14 German balloons during the war.

Pilots use call signs in place of their names when communicating, both for security and identification purposes. The "FRANK" call sign was a reference to a WWI pilot, Frank Luke, the first airman to receive the Medal of Honor after shooting down over a dozen aircraft, including 10 spy balloons, in just eight days during World War I.

https://www.businessinsider.com/wwi-pilot-callsign-signaled-china-spy-balloon-frank-luke-arizona-2023-2