William, the fourth Lord Byron.   Mary Egerton, the first wife of William, the fourth Lord Byron.
     
 
Vice-Admiral Byron (Foulweather Jack) the grandfather of the Poet.   Sophia, the wife of Vice-Admiral Byron, the grandmother of the Poet,
     
 
The children of William, the fourth Lord Byron, by his second wife, Frances, daughter of the Earl of Portland.   William Chaworth, who was killed by William, the fifth Lord Byron, in a duel, 1765.