Surprised you haven't heard of Donald. Kenneth also had a daughter June, who has lived in Australia (Perth I think) for years. If I recall correctly she married a naval man and they have had children, granddaughters to Kenneth. They produced a tribute video on the anniversary of Donald's death. See link below to the tribute video and also a link to a video of Donald talking about his dad Kenneth.
It seems Kenneth was a pretty tough nut, Donald talks highly of his virtues so I imagine Kenneth probably did do much of what he wrote about.

https://www.youtube.com/watch?v=qJznwgzhmCY
https://www.youtube.com/watch?v=Gw8y0Mec558&t=1s

Here's an image of Donald taking out a charging leopard (panther) with his 10.75x68. Kenneth allowed Donald to narrate the hunt in his own words in one of his books. Very frightening how the school friend photographer ended up behind the charging leopard.

Maybe we will get to see buckstix recreate such a feat with his new 10.75x68