Guy Lumbago

Joke on the name of long-time bandleader Guy Lombardo (1902-1977). The joke's almost as old as his career, I found a reference from 1931.

Lombardo was a Canadian-American bandleader of Italian descent known as the "King of Corn." His band was the Royal Canadians.

Lumbago is an old term for lower back pain.

References

June 26, 1931 issue of Radio Dial mentions he receives many letters addressed to "Guy Lumbago"
December 1932 issue of student magazine, The Purple Parrot.
Guy Lumbago and His Boiled Kanadians. "Porky at the Crocadero" (1938), reference to Guy Lombardo and His Royal Canadians
Guy Lumbago and His Royal Canadian Cottonpickers (1952)
A music piece titled "Guy Lumbago plays Lawrence Welch" Jan.-June 1970, by Al Polhamus
A music piece titled "Lawrence Milk Plays Guy Lombago" by Carroll DeCamp July-Dec. 1970.