No, bass-baritone Ruggero Raimondi and the late tenor Gianni Raimondi are not related. Despite sharing a similar last name and both being prominent figures in the opera world, there is no known familial connection between them. They each had distinct careers and contributions to classical music.
Timoleon Raimondi died in 1894.
Franca Raimondi died in 1988.
Luigi Raimondi died in 1975.
Antonio Raimondi died in 1890.
Pietro Raimondi died on October 30, 1853 at the age of 66.
Sergio Raimondi died on January 9, 2003, in Rome, Lazio, Italy.
Gianni Pons died in 1975.
Gianni Bonos died in 1956.
Gianni Danzi died in 2007.
Alberto Gianni died in 1930.
Gianni Poggi died in 1989.