The Futu Dynasty was an early Chinese dynasty that flourished around 5519 BC on Earth.
History
In 5519 BC, while China was still establishing a civilisation, Lin Futu, a member of the Futu dynasty, was abducted by the Monarch and other Urbankans. He was taken to Urbanka with fellow Chinese and they were converted into androids. (TV: Four to Doomsday)
The Futu dynasty did not exist historically on Earth. It is possible that it was a minor dynasty, of which knowledge was not passed down to the 20th Century.