The Forbes-Leith of Fyvie baronetcy, of Jessfield in the County of Midlothian, originally the Burn baronetcy, was created in the Baronetage of the United Kingdom on 7 March 1923 for the soldier and Conservative politician Charles Rosdew Burn.
Ethel, only daughter and heiress of Alexander John Forbes-Leith, 1st Baron Leith of Fyvie.
By edict of the Lord Lyon in 1925 Burn assumed the surname and arms of Forbes-Leith of Fyvie, for himself, his wife and son, according to the terms of his father-in-law's will.
Lord Leith of Fyvie was the eldest son of Rear-Admiral John James Leith by his wife Margaret, daughter and heir of Alexander Forbes, a descendant of Duncan Forbes, second son of the second Lord Forbes.
The heir apparent is the present holder's son Alexander Philip George Forbes-Leith (born 1999).