Is trudy desmond the daughter of johnny desmond?

I doubt it

Johnny Desmond was born on November 14, 1919.

Johnny Desmond died on September 6, 1985 at the age of 65.

Johnny Desmond died on September 6, 1985 at the age of 65.

Johnny Desmond was born on November 14, 1919 and died on September 6, 1985. Johnny Desmond would have been 65 years old at the time of death or 92 years old today.