Sir Andrew Armstrong, 1st Baronet DL (19 October 1786 – 27 January 1863) was an Irish baronet and politician. Early life. Born at Gallen Priory in County Offaly, Armstrong was the son of Edmund Armstrong and his wife Elizabeth, third daughter of Frederick Trench and sister of Frederick Trench, 1st Baron Ashtown. Career as politician. Armstrong served as captain in the King's County Militia. and was appointed High Sheriff of King's County in 1811, and again in 1836, and served as deputy lieutenant of that county.
https://en.wikipedia.org/wiki/Andrew_Armstrong