My Great Great Great Great Great Great Great Great Grandfather was in charge of the slaughtering of around 100+ English Civilians. He was a Scot and invited the English to a "peaceful" feast at his estate. Once they were inside the doors locked and he and his Scot army killed them all one by one. And my Third Cousins own a castle in Scotland. ~on my Mother's side
And in the late 1700s my great grandpa Taft owned 1/6 of California. ~on my Father's side
I don't have any famous relatives but my grandfather on my fathers side is a millionaire. He's a social engineer and he used that to buy land cheap and then sell it a few years later for some 500% more.
When my dad was a kid he bought a plot of land right in the middle of where they were about to build a baseball field for $2,000, 5 years later he sold it for $20,000
My Great Grandad sang for Louis Armstrong before he became famous, my Hrandad could've become famous with him, but he stayed back home and married my great grandma. So he's Semi-Famous.