Complex sentence: It was created in 1822 for Richard Temple-Nugent-Brydges-Chandos-Grenville, 2nd Marquess of Buckingham, who was created Marquess of Chandos and Duke of Buckingham and Chandos at the same time.
Split into simpler sentences: It was created in 1822 for Richard Temple-Nugent-Brydges-Chandos-Grenville, 2nd Marquess of Buckingham. He was made Marquess of Chandos and Duke of Buckingham and Chandos at the same time.