Complex sentence: Grey Brydges, 5th Baron Chandos (c.1580--1621), Lord Lieutenant of Gloucestershire, was called the "king of the Cotswolds", owing to his generosity and his magnificent style of living at his residence, Sudeley Castle.
Split into simpler sentences: Grey Brydges, 5th Baron Chandos (c.1580--1621). He become Lord Lieutenant of Gloucestershire and was called the "king of the Cotswolds", owing to his generosity and his magnificent style of living at his residence, Sudeley Castle.