Harriet Jane Duntze

From Wikipedia: Sir James Cockburn, 8th Baronet

In 1755 James Cockburn married his first wife Mary Douglas, the daughter of his business partner Henry Douglas of Friarshaw. They had three daughters:

• [2nd daughter] Harriet Jane Cockburn, who married James Nicholas Duntze, son of Sir John Duntze, Baronet

From The house of Cockburn of that ilk and the cadets thereof by with historical anecdotes of the times in which many of the name played a conspicuous part by Thomas H. Cockburn-Hood Published 1888 Pages 102-106

XX. Sir James Cockburn of Langton, seventh Baronet, NOTE conflicts with current 8th Baronet second son of William Cockburn of Ayton, ...

He married first in 1755 Mary Douglas, only daughter of Henry Douglas of Friarshaw, of the ancient house of Cavers (whose brother James Douglas, afterwards of Springwood, County Roxburgh, brought home the tidings of the taking of Quebec. He was an Admiral in the Royal Navy, and was made a Baronet for distinguished services in 1786). By her he had three daughters, Mary Cockburn, Frances Cockburn, who both died unmarried, and Harriet Duntze (née Cockburn), who married in 1792 James Nicholas Duntze, second son of Sir John Duntze, Baronet.