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

He was a Captain in the Royal Navy and married on July 4 1825 Helen Selina Sheridan, daughter of Thomas Sheridan, himself the eldest son of the playwright and statesman Richard Brinsley Sheridan, and had issue:

• Frederick Temple Hamilton-Temple-Blackwood, 5th Baron Dufferin and Claneboye

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