At least one of my grandparents was born in the 19th Century. The rest were all born before 1910.
By the way, @KarlLB, thirty isn't old! Sorry, working out a minimum for that. I am assuming all children born in wedlock. If you can be married at 15 then you can have a child at 15, so if both generations did that, that would make your Grandfather 30 when you were born, which would make you now 30. Mind you, given the maximum, you could be 120, basically, I am assuming your Grandfather was alive when you were born, so he must have been younger than the oldest man. For your grandmother, this would be limited to something around 100.
At least one of my grandparents was born in the 19th Century. The rest were all born before 1910.
By the way, @KarlLB, thirty isn't old! Sorry, working out a minimum for that. I am assuming all children born in wedlock. If you can be married at 15 then you can have a child at 15, so if both generations did that, that would make your Grandfather 30 when you were born, which would make you now 30. Mind you, given the maximum, you could be 120, basically, I am assuming your Grandfather was alive when you were born, so he must have been younger than the oldest man. For your grandmother, this would be limited to something around 100.
You missed the data point that said Grandfather was born before WW1
My grandfather was born almost 140 years ago. My father was born before WW1. I don't feel that old, though. But then again, my daughter once looked astonished that I had vivid memories of Abba winning the Eurovision Song Contest. Because that was soooooo long ago....
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By the way, @KarlLB, thirty isn't old! Sorry, working out a minimum for that. I am assuming all children born in wedlock. If you can be married at 15 then you can have a child at 15, so if both generations did that, that would make your Grandfather 30 when you were born, which would make you now 30. Mind you, given the maximum, you could be 120, basically, I am assuming your Grandfather was alive when you were born, so he must have been younger than the oldest man. For your grandmother, this would be limited to something around 100.
You missed the data point that said Grandfather was born before WW1