There are several characters associated with London.
James (Mad)Lucas was a recluse who took up residence in Redcoats, near Hitchin. He was a celebrity of the day - visited by many well know personalities including Charles Dickens who based “Mr. Mopes" of the 1861 story Tom Tiddler's Ground .
The Lucas brothers (builders) were responsible for constructing many fine buildings including The Royal Albert Hall.
A family member that made his fortunes in Jamaica was Samson Lucas. He returned home and died in 1789 London.