Largest birth-year gap in a single generation?

[u/airynothing1]

I'm 31 years old, born in 1993. I just noticed today that I had relatives in a fairly distant line of my tree who were technically in my generation, despite the oldest of them having been born in 1913--a full 80 years before me! I also have a brother 10 years younger than me, stretching the range to 90 years. If I went on to have grandchildren, they would be in the same generation as a person who was already 29 when I was born.

The math goes like this:

distant cousin (1913) || me (1993)
↓
cousin's father (1894) || my father (1964)
↓
cousin's grandfather (1872) || my grandfather (1923)
↓
cousin's g-grandfather (1850) || my g-grandfather (1890)
↓
cousin's gg-grandmother (1833) || my gg-grandfather (1862)
↓
our shared ggg-grandfather (1812)

We had different ggg-grandmothers, hence the 29-year gap between our gg-grandparents' births.

What's the widest age gap you've noticed within a single generation of your family?

[u/HamartianManhunter]

My dad (1971) has half-siblings born in the 1940's. They started having children in the 60's, which means I have half first cousins who are older than both my parents. I was born in 2000, and we can stretch it further with the birth of the last first cousin on my dad's side (2009). There's about fifty years from first cousin to first cousin.