Lieutenant-General Sir Robert Arbuthnot, KCB was a British military commander during the Napoleonic Wars. He was a general in the army, a colonel in the 76th Regiment. He was a brigadier general in the Portuguese Service and was appointed a Knight of the Tower and Sword of Portugal (KTS).

The 76th Regiment of Foot was a British Army regiment, raised in 1787. Under the Childers Reforms it amalgamated with the 33rd Regiment to form the Duke of Wellington's Regiment in 1881.