Samuel Langhorne Clemens, better known as Mark Twain: died at 75y/o (heart attack)
Wife Olivia Langdon Clemens: died at 58y/o (heart failure)
Son Langdon Clemens: died at 19 months (diptheria)
Daughter Suzy Clemens: died at 24y/o (spinal meningitis)
Daughter Clara Clemens: died at 88y/o (likely overdose)
Daughter Jean Clemens: died at 29y/o (drowned in bathtub after epileptic seizure)
Worth noting the life expectancy when Mark Twain was born was about 60-65, so he did outlive the average by 10-15 years. But this is still more due to his children having tragic deaths rather than his longevity.