My grandfather and grandmother on my mothers side were born in the 1920s. They died in a car accident 1989, when i was to young to remember. I only know them from photos.
I am possibly amongst the last people that know of them, but i can't claim to have known them. Assuming that random people count into the rules, there might be somebody who was four in 1989 and has for some reason some memory of some interaction with my grandperents. If thad person lives 100 years, to 2085, thad still is over 100 years short of 200.
TLDR think 200 is far of, it's more like 100 years.