I came across the fact that William Frawley (Fred Mertz from I Love Lucy) was born in 1887.
That got me to think about the question: "Did I ever personally know anyone born in the 1800's"
So I called my mom. She got out the family Bible.
We found 3 people that I knew: Great-Grandparents and a neighbor lady.
The funny part of the story was that there were some people that we both THOUGHT were so old they MUST have been born in the 1800's.
My mom said "Oh God, they looked real old when "I" was young".
To our surprise, we discovered they were MUCH younger that either of us thought.
So I can now honestly say I have known people from 3 different centuries : 1800's, 1900's, and 2000's.