If we confine Queen Charlotte and King George III's family tree just to legitimate heirs, ... The third son of Charlotte and George, Prince William Henry was born on August 21, 1765.

If we confine Queen Charlotte and King George III's family tree just to legitimate heirs, it looks like this: ... the third daughter of George and Charlotte, was born May 22, 1770.

Here is their full family tree. ... Prince William Henry, the third son of Queen Charlotte and King George, had 10 illegitimate children with Irish actress Dorothea Bland starting in 1791.