Sir John Fowler Leece Brunner, 2nd Baronet (24 May 1865 – 16 January 1929) was a British Liberal Party politician.

On 8 September 1890 John got into difficulties whilst swimming in Lake Como, Italy.

He was rescued by his younger brother, Sidney Herbert Brunner, who died in the process.

Their daughter Joyce Morgan Brunner married Sir William Worsley, 4th Baronet, and their granddaughter Katharine married Prince Edward, Duke of Kent, thereby becoming Her Royal Highness The Duchess of Kent.

Their son Felix succeeded as the 3rd baronet upon the death of Sir John, age 63.