The Duchy of Athens was one of the Crusader states set up in Greece after the conquest of the Byzantine Empire during the Fourth Crusade as part of the process known as Frankokratia, encompassing the regions of Attica and Boeotia, and surviving until its conquest by the Ottoman Empire in the 15th century.
Louis Antoine de Bourbon, Duke of Enghien was a member of the House of Bourbon of France. More famous for his death than his life, he was executed by order of Napoleon Bonaparte, who brought charges against him of aiding Britain and plotting against Napoleon.
Walter VI of Brienne was a French nobleman and crusader. He was the count of Brienne in France, the count of Conversano and Lecce in southern Italy and claimant to the Duchy of Athens in Frankish Greece.
Walter V of Brienne was Duke of Athens from 1308 until his death. Being the only son of Hugh of Brienne and Isabella de la Roche, Walter was the heir to large estates in France, the Kingdom of Naples, and the Peloponnese. He was held in custody in the Sicilian castle of Augusta between 1287 and 1296 or 1297 to secure the payment of his father's ransom to the Aragonese admiral Roger of Lauria. When his father died fighting against Lauria in 1296, Walter inherited the County of Brienne in France, and the counties of Lecce and Conversano in southern Italy. He was released, but he was captured during a Neapolitan invasion of Sicily in 1299. His second captivity lasted until the Treaty of Caltabellotta in 1302.
During the late Middle Ages, the two cities of Argos and Nauplia formed a lordship within the Frankish-ruled Morea in southern Greece.
Mary of Enghien, also known as Maria d'Enghien, was ruling Countess of Lecce from 1384 to 1446 and Queen of Naples and titular Queen of Sicily, Jerusalem and Hungary from 1406 to 1414 by marriage to Ladislaus of Naples.
Isabella of Brienne (1306–1360) was suo jure Countess of Lecce and Conversano, claimant to the Duchy of Athens and Kingdom of Jerusalem, etc.
Louis of Enghien titular Duke of Athens, Count of Brienne and Lord of Enghien in 1381–1394, Count of Conversano in 1356–1394.
The Principality of Taranto was a state in southern Italy created in 1088 for Bohemond I, eldest son of Robert Guiscard, as part of the peace between him and his younger brother Roger Borsa after a dispute over the succession to the Duchy of Apulia.
The County of Brienne was a medieval county in France centered on Brienne-le-Château.
John, Count of Brienne was the eldest son of Walter IV of Brienne and Marie of Cyprus.
Walter IV of Enghien, Hainault nobleman and soldier, was the son of Sohier of Enghien. He was Count of Brienne as Walter VII and Lord of Enghien in 1364–1381.
Joanna of Châtillon or Joan, French: Jeanne; was the wife of Walter V of Brienne (1305). She was Duchess of Athens by marriage (1308–1311). She was the daughter of Gaucher V de Châtillon, Constable of France and Isabelle de Dreux. Her paternal grandparents were Gaucher IV de Châtillon and Isabelle de Villehardouin. Her maternal grandparents were Robert de Dreux, Viscount of Chateaudun and Isabelle de Villebéon.
Boniface of Verona was a Lombard Crusader lord in Frankish Greece during the late 13th and early 14th century. A third son from a junior branch of his family, he sold his castle to equip himself as a knight, became a protégé of Guy II de la Roche, Duke of Athens, expelled the Byzantines from Euboea in 1296, and advanced to become one of the most powerful lords of Frankish Greece. Following Guy II's death, he served as regent for the Duchy of Athens in 1308–09, and was captured by the Catalan Company in the Battle of Halmyros in March 1311. The Catalans held Boniface in high regard, and offered to make him their leader. Boniface refused, but retained close relations with them, sharing their hostility towards the Republic of Venice and its own interests in Euboea. Boniface died in late 1317 or early 1318, leaving his son-in-law, the Catalan vicar-general Alfonso Fadrique, as the heir of his domains.
Marguerite d'Enghien, was the ruling suo jure Countess of Brienne and of Conversano, suo jure Lady of Enghien, and Lady of Beauvois from 1394 until an unknown date.
John of Luxembourg, was Lord of Beauvoir and Richebourg, and also Count of Brienne and Conversano.
Guy of Enghien was the lord of Argos and Nauplia from 1356 to 1377 as vassal of the Principality of Achaea and titular duke of Athens as Guy III. He was son of Walter III of Enghien and Isabella of Brienne.
Maria of Enghien, also known as Marie of Enghien or d'Enghien, was the Lady of Argos and Nauplia in Frankish Greece from 1376 or 1377 to 1388. Because she was a minor when she inherited the lordship from her father, Guy of Enghien, his brother, Louis of Enghien, was appointed to be her guardian. Louis gave Maria in marriage to a Venetian patrician, Pietro Cornaro, in 1377. Maria moved to Venice, but she was involved in the administration of her lordship. After her husband died, she sold the lordship to the Republic of Venice for a regular income in 1388.
Pietro Cornaro, also known as Peter Cornaro or Corner, was Lord of Argos and Nauplia in Frankish Greece from 1377.
