Barry John Yelverton, 3rd Viscount Avonmore

Barry John Yelverton, 3rd Viscount Avonmore (21 February 1790 – 24 October 1870) was an Irish nobleman.

He was the son of William Charles Yelverton, 2nd Viscount Avonmore and Mary Reade, eldest daughter of John Reade. In 1814, he succeeded his father as viscount.

He married, firstly, Jane Boothe, daughter of Thomas Boothe, in 1811 and had the following issue:

His first wife having died in 1821, Lord Avonmore married secondly, Cecilia O'Keefe, daughter of Charles O'Keefe and Letitia Yelverton, on 1 August 1822. They had the following issue:

Lord Avonmore died in Dublin and was succeeded in the viscountcy by his third and only surviving son, William.

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