Yannis Makriyannis (, "Giánnēs Makrygiánnīs"; 1797–1864), born Ioannis Triantaphyllou (, "Iōánnēs Triantafýllou"), was a Greek merchant, military officer, politician and author, best known today for his "Memoirs". Starting from humble origins, he joined the Greek struggle for independence, achieving the rank of general and leading his men to notable victories, most notably the successful defence of Nafplio in the Battle of the Lerna Mills. Following Greek independence, he had a tumultuous public career, playing a prominent part in the granting of the first Constitution of the Kingdom of Greece and later being sentenced to death and pardoned.