Complex sentence: Henry Monckton (1740--28 June 1778) was the fourth son of John Monckton, 1st Viscount Galway and the younger brother of the more famous Robert Monckton, the 2nd Viscount Galway.
Split into simpler sentences: Henry Monckton (1740--28 June 1778) was the fourth son of John Monckton, 1st Viscount Galway and the younger brother of the more famous Robert Monckton. Born in 1740, Monckton was the fourth son of John Monckton, 1st Viscount Galway.