Bryan Magennis, 5th Viscount Iveagh (c. 1655 – September 1692) was an Irish Jacobite peer and soldier.
[2] In May 1689 he was summoned to the Irish House of Lords in the brief Patriot Parliament called by James II.
Magennis served as colonel of his regiment of foot during the Siege of Limerick.
[1] Upon the conclusion of the Williamite War in Ireland, Magennis was commissioned in March 1692 to raise a regiment of five of companies of Irish Catholics, each of 100 soldiers, to serve in the army of Leopold I, Holy Roman Emperor.
From Hamburg, they were sent to fight in Hungary against the Turks, but almost all, including Magennis, had died of disease by the end of 1692.