Bethell Walrond was the heir male and representative of Col. Humphrey Walrond, a distinguished Royalist commander, who on 5 August 1653, was created a Marquess de Vallado, Conde de Parama, Conde de Valderonda, and a Grandee of the 1st Class by Philip IV, King of Spain. Walrond served as Justice of the Peace and Deputy Lieut. in Devon, and was also a Member of Parliament for Sudbury and Saltash. On 10 November 1829, he married the Lady Janet St. Clair, only daughter of James, 2nd Earl of Rosslyn and Knight Grand Cross of the Order of Bath. They had a son, Henry, and a daughter, Harriet. Mr. Walrond, also one of the co-heirs of the ancient Barony of Welles, petitioned the King in 1832 to terminate the abeyance in his behalf; this was referred to the Attorney-General, who found in favor of the claims of his petition.
Burke, Sir Bernard. A Genealogical and Heraldic History of the Landed Gentry of Great Britain. Edited by Ashworth P. Burke. 10th ed. London, 1900: 1641.