Douglas coat of arms      

 

Lady Elizabeth Montague

 

On the death of the Reverend James Douglas, 4th Baron Douglas of Douglas, the Barony of Douglas of Douglas became extinct.

The titles* devolved to his half sister, Lady Montague, and passed from her to his niece, the Countess of Home

Elizabeth was the daughter of the Henry, 3rd Duke of Buccleugh.

She married: Sir Alexander Home, 10th Earl of Home on 9th Nov 1798

Their son, Cospatrick Alexander Home, 11th Earl of Home, was on 11 June 1875 created Baron Douglas. He had been previously elected a Scottish representative peer and this Barony gave him a permanent seat in the House of Lords. He had married in 1832 Lucy Montagu-Scott, daughter of Henry James Montagu-Scott, 2nd Baron Montagu of Boughton by his wife Jane Margaret Douglas, daughter of the first Baron Douglas by his first wife Lucy Graham. Their son adopted the surname of Douglas-Home in 1877 and succeeded as Baron Douglas and Earl of Home in 1888. The title is currently held by David Douglas-Home, 15th Earl of Home and 5th Baron Douglas.

 

* I am unsure to which titles this refers.