Curious to see if there were any patterns to length of life for my ancestral families, I created a chart. The one who lived the longest was my own father, Aldren Auld Watson, who lived until he was 96.
Taking 6 generations of the Watson male line only, with people from 1825 to the present, the average age at death was 80, making Watsons fairly long-lived.
Here are pictured 5 generations of Watson men with their generation number in parentheses, followed by length of life in years.