Sir John Brownlow, 3rd Baronet
Brownlow was the eldest surviving son of Sir Richard Brownlow, 2nd Baronet of Humby, and Elizabeth Freke. He was educated at Westminster School. He succeeded his father as third Baronet of Humby in 1668 and in 1679 he inherited the Belton estates from his great-uncle Sir John Brownlow, 1st Baronet of Belton. He built the present Belton House between 1685 and 1687, creating new gardens and lakes. 
In 1686 he was treasurer of the Marshalsea and in 1688 appointed as High Sheriff of Lincolnshire. In 1689 he was elected to the House of Commons for Grantham, a seat he held until his premature death in 1697.
Brownlow married Alice, daughter of Richard Sherard, in 1676. He committed suicide in July 1697 after suffering from severe gout, aged only 38, without surviving male issue. He was succeeded in his title by his younger brother William Brownlow, who received Belton House on condition that John's wife Alice retained possession during her lifetime (she died in 1721). It would later pass to William's son John Brownlow, 1st Viscount Tyrconnel.
His remaining estate was divided among his daughters: 
- Jane (died 1736) - married the 2nd Duke of Ancaster and Kesteven in 1711
- Elizabeth (1681–1723) - married the 6th Earl of Exeter in 1699
- Alicia (1684–1727) - married the 2nd Baron Guilford in 1703
- Margaret (1687–1710) -
- Eleanor (1691–1730) - married her first cousin, John Brownlow, 1st Viscount Tyrconnel, son of his brother Wiilliam, in 1712.
|Parliament of England|
|Member of Parliament for Grantham
With: Sir Willam Ellys, Bt
Sir William Ellys, Bt
Sir John Thorold, Bt
|Baronetage of England|