Price Blackwood, 4th Baron Dufferin and Claneboye (6 May 1794 – 21 July 1841) was the third and eldest surviving son of Hans Blackwood, 3rd Baron Dufferin and Claneboye.

He was a Captain in the Royal Navy

Royal Navy

The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

 and married on 4 July 1825 Helen Selina Sheridan, daughter of Thomas Sheridan, himself the eldest son of the playwright and statesman Richard Brinsley Sheridan

Richard Brinsley Sheridan

Richard Brinsley Butler Sheridan was an Irish-born playwright and poet and long-term owner of the London Theatre Royal, Drury Lane. For thirty-two years he was also a Whig Member of the British House of Commons for Stafford , Westminster and Ilchester...

, and had issue:

• Frederick Temple Hamilton-Temple-Blackwood, 5th Baron Dufferin and Claneboye
  Frederick Hamilton-Temple-Blackwood, 1st Marquess of Dufferin and Ava
  Frederick Hamilton-Temple-Blackwood, 1st Marquess of Dufferin and Ava, KP, GCB, GCSI, GCMG, GCIE, PC was a British public servant and prominent member of Victorian society...
  
  

Lord Dufferin died from an accidental overdose of morphine and was succeeded by his only son. Helen Lady Dufferin was married secondly after his death to George Hay, Earl of Gifford (1822–1862), the eldest son of George Hay, 8th Marquess of Tweeddale

George Hay, 8th Marquess of Tweeddale

Field Marshal George Hay, 8th Marquess of Tweeddale, KT, GCB was a Scottish soldier and administrator.-Military career:...

 on 13 October 1862. He died on 22 December 1862, and Lady Dufferin died on 13 June 1867.