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.
Antonio Raimondi died in 1890.
Luigi Raimondi died in 1975.
Franca Raimondi died in 1988.
Pietro Raimondi died on October 30, 1853 at the age of 66.
Sergio Raimondi died on January 9, 2003, in Rome, Lazio, Italy.
Gianni Bonos died in 1956.
Gianni Pons died in 1975.
Gianni Poggi died in 1989.
Gianni Giansanti died in 2009.
Alberto Gianni died in 1930.