King Henry VIII had at lest one illegitimate by his mistress
Elizabeth Blount, that Child was Henry FitzRoy, 1st Duke of
Richmond and Somerset, 1st Earl of Nottingham, Born 15 June 1519
Died 23 July 1536, we're sure Henry FitzRoy is his son because he
acknowledged him, other illegitimate can be debated, some
Historians think that the children of Mary Boleyn, Lady Catherine
Carey (1524-1569) and Henry Carey, 1st Baron Hunsdon (1526-1596),
were the illegitimate children of Henry VIII they were never
acknowledged as such the way Henry FitzRoy was.