Tony Cavallari

Tony Cavallari (b. 1948) is a professional guitar. He played with several bands throughout his career, including the psychedelic group H.P. Lovecraft from is formation in 1967 through its disbanding in 1969. He did not join any of the subsequent spin-offs of the band that formed in the 1970s and 1980s.

Cavallari continued to play off and on. As of 2011, he resided in California.

Tony Cavallari in "The Fillmore Shoggoth"
Tony was the guitarist for the band HPL. He and the rest of the band were witness to a shoggoth attack on the Fillmore in San Francisco. He survived the attack with the rest of the band.

Literary comment
While Turtledove never explicitly gives "Tony" a last name, he provides enough clues in the story to confirm that Tony is indeed meant to be the historical Tony Cavallari.