Just a thought, Pie: how about
John Winston Lennon? Born in 1940 ... surely the mn was Prime Ministerial? OK, it's been a long time!
Here in South
Africa there was a lower-case liberal MP,
Helen Suzman, who was a vocal and erudite thorn in the side of the nasty government of the day; I know of at least one journalist who named his daughter after her. Not a PM, but close.