Henry Boyle, 3rd Earl of Shannon

He then briefly served as Member of Parliament for Bandon in 1807, succeeding as Earl of Shannon later in the same year.

[3] His sister Catherine Henrietta Boyle married Francis Bernard, 1st Earl of Bandon.

[4] Their maternal grandparents were John Ponsonby, Speaker of the Irish House of Commons from 1756 to 1771, and his wife Lady Elizabeth Cavendish.

[5] Lady Elizabeth was a daughter of William Cavendish, 3rd Duke of Devonshire, and his wife Catherine Hoskins.

According to his obituary in The Gentleman's Magazine, Boyle "took an active part in arming the yeomanry in Ireland."

On 31 October 1796 Boyle was commissioned Captain of five different units, those of Castlemartyr, Cloyne, Cove, Imokilly and Middleton.

The Irish Rebellion of 1798 was assisted by a French invasion force under Jean Joseph Amable Humbert.

The Act of Union 1800 resulted in the formation of the United Kingdom of Great Britain and Ireland.

Boyle was among the new Members of the House of Commons, representing County Cork in the new Parliament of the United Kingdom from 1801 to 1807.

All members of the House of Commons entered it by right of their previous election to seats in Great Britain or Ireland.

Possibly indicating support for the political coalition led by William Cavendish-Bentinck, 3rd Duke of Portland.