lieutenant-colonel (Ninian) Pinkney

Ninian Pinkney, sometimes also spelled Pinckney, was a United States Army officer active in the early republic. Surviving records show him serving as a captain and later as a lieutenant-colonel, and he is named among the senior officers of the 2nd Infantry Regiment at Sackett's Harbor after the Army reorganizations of 1815.

He also appears in federal legislation from the period: an act of Congress directed the secretary of war to allow him payment for earlier service as a brigade inspector in 1808 and 1809. That small detail helps place him among the professional officers helping shape the young U.S. Army during a formative period.

Pinkney was connected with Annapolis, Maryland, where he bought the Hammond–Harwood House in 1810 and sold it again in 1811. Clear biographical details beyond these records are limited in the sources I could confirm here, so his story survives mainly in military and property records rather than in a full modern biography.