Fitzroy was born sometime in June, 1519 - the exact date is unknown (but it is presumed to be between the 9th and 18th).
His mother, Elizabeth, was taken from the court and kept hidden until the child was born. Lady Elizabeth Blount, was one of Queen Catharine’s maids.
And, when the queen was in the later stages of her pregnancy, Blount also became one of Henry VIII’s many mistresses (he was a real catch, wasn't he?).
Although Fitzroy’s birth and christening were conducted privately, Henry VIII did not shy from claiming the infant child as his own, giving him the name Fitzroy, which is Anglo-Norman for ‘son of a king’, and, of course, the Christian name Henry.
In fact, Henry even proudly showed off his newborn son at the Havering-atte-Bower or Newhall manor, introducing the entire court, including his wife, who had only recently given birth to a still-born daughter (sensitivity wasn't Henry VIII's middle name), to the infant Henry Fitzroy.