His mother was the second daughter of Sir Bellingham Graham, 6th Baronet.
[1] He was a member of a junior branch of the Greville family headed by the Earl of Warwick.
[2] He served as an officer in the 1st Life Guards, and in 1850 was appointed Colonel of the disembodied Westmeath Militia.
[3] Greville sat as Member of Parliament for Longford County as a Liberal from 19 July 1852 until 1869, when he was raised to the Peerage of the United Kingdom as Baron Greville, of Clonyn in the County of Westmeath.
[5] On 28 April 1840 Lord Greville married Lady Rosa Emily Mary Anne Nugent, the only daughter and heir of George Nugent, 1st Marquess of Westmeath and, his first wife, Lady Emily Cecil (second daughter of James Cecil, 1st Marquess of Salisbury).