Baron Brownlow, of Belton in the County of Lincoln, is a title in the Peerage of Great Britain. It was created in 1776 for Sir Brownlow Cust, 4th Baronet. The Cust family descends from Richard Cust (1622-1700) of The Black Friars, Stamford, who represented Lincolnshire and Stamford in Parliament. In 1677 he was created a baronet, "of Stamford in the County of Lincoln". He was succeeded by his grandson , who married Anne Brownlow, daughter of Sir William Brownlow, 4th Baronet, "of Humby", Lincolnshire, and sister and sole heiress of John Brownlow, 1st Viscount Tyrconnel, 5th Baronet of Belton House, Lincolnshire.The 2nd Baronet's son Sir John Cust, 3rd Baronet, sat as a Member of Parliament for Grantham and served as Speaker of the House of Commons from 1761 to 1770 and in 1754 inherited th