Who was Bert Kid McCoy?
The only reference to "Kid" McCoy I can find is for Charles Kid McCoy, a boxer. http://www.cyberboxingzone.com/boxing/mccoy-k.htm
from Snopes.com: There are a number of competing theories as to who or what was "the real McCoy": Elijah McCoy, inventor of a device that lubricated the moving parts of a railway locomotive, or his invention itself. Someone from the Hatfield-McCoy family feud of the 1880s. Products of the Nelson McCoy Pottery company in Ohio. Booze supplied by Prohibition-era rum-runner named Bill McCoy, whose product was said to always be of the highest quality. Joseph…
Clyde McCoy has: Played Extra in "The Idle Class" in 1921. Played Mac in "A Midnight Bell" in 1921. Played Clyde McCoy in "Clyde McCoy and His Orchestra" in 1936. Played Clyde McCoy in "The Jam Session" in 1937. Played Clyde McCoy in "Clyde McCoy and His Sugar Blues Orchestra in His Busy Day" in 1938.