Jure uxoris (a Latin phrase meaning "by right of (his) wife") describes a title of nobility used by a man because his wife holds the office or title suo jure ("in her own right"). Similarly, the husband of an heiress could become the legal possessor of her lands. For example, married women in England and Wales were legally prohibited from owning real estate until the Married Women's Property Act 1882.
Antoine (Spanish: Antonio, Basque: Antonio, 22 April 1518 – 17 November 1562), sometimes called Antoine of Bourbon, was King of Navarre from 1555 until his death in 1562 as the husband and co-ruler of Queen Jeanne III. He was the first monarch of the House of Bourbon, of which he became head in 1537. Despite being first prince of the blood in France, Navarre lacked political influence and was dominated by King Henry II of France's favourites, the Montmorency and Guise families. When Henry II died in 1559, Navarre found himself sidelined in the Guise-dominated government, and then compromised by his brother's treason. When Henry's son, King Francis II of France, soon died in turn, Navarre returned to the centre of politics, becoming Lieutenant-General of France and leading the army of the crown in the first of the French Wars of Religion. He died of wounds sustained during the Siege of Rouen. He was the father of King Henry IV, France's first Bourbon king.
Ferdinand II, also known as Ferdinand I, Ferdinand III, and Ferdinand V (10 March 1452 – 23 January 1516), called Ferdinand the Catholic, was King of Aragon from 1479 until his death in 1516. As the husband and co-ruler of Queen Isabella I of Castile, he was also King of Castile from 1475 to 1504 (as Ferdinand V). He reigned jointly with Isabella over a dynastically unified Spain; together they are known as the Catholic Monarchs. Ferdinand is considered the de facto first king of Spain, and was described as such during his reign, even though, legally, Castile and Aragon remained two separate kingdoms until they were formally united by the Nueva Planta decrees issued between 1707 and 1716.
The Crown of Aragon that Ferdinand inherited in 1479 included the kingdoms of Aragon, Valencia, Mallorca, Sardinia, and Sicily, as well as the Principality of Catalonia. His marriage to Isabella is regarded as the "cornerstone in the foundation of the Spanish monarchy". They played a major role in the European colonization of the Americas, sponsoring the first voyage of Christopher Columbus in 1492. That year the couple defeated Granada, the last Muslim state in Western Europe, thus completing the centuries-long Reconquista.
Henry VI (German: Heinrich VI.; November 1165 – 28 September 1197), a member of the Hohenstaufen dynasty, was King of Germany (King of the Romans) from 1169 and Holy Roman Emperor from 1191 until his death. From 1194 he was also King of Sicily as the husband and co-ruler of Queen Constance I.
Henry was the second son of Emperor Frederick Barbarossa and Beatrice I, Countess of Burgundy. Well educated in the Latin language, as well as Roman and canon law, Henry was also a patron of poets and a skilled poet himself. In 1186 he married Constance of Sicily. Henry, stuck in the Hohenstaufen conflict with the House of Welf until 1194, had to enforce the inheritance claims by his wife against her nephew Count Tancred of Lecce. Henry's attempt to conquer the Kingdom of Sicily failed at the siege of Naples in 1191 due to an epidemic, with Empress Constance captured. Based on an enormous ransom for the release and submission of King Richard I of England, he conquered Sicily in 1194; however, the intended unification with the Holy Roman Empire ultimately failed due to the opposition of the Papacy. In Sicily, Henry had a reputation for ruthless suppression of political opponents. To this day, he is sometimes given the epithet "the Cruel" (il crudele) by Italian historiographers.
Dom Ferdinand II (German: Ferdinand August Franz Anton Koháry von Sachsen-Coburg-Gotha; 29 October 1816 – 15 December 1885), also known as Ferdinand of Saxe-Coburg and Gotha and as "the King-artist" (Portuguese: o Rei-Artista), was King of Portugal from 16 September 1837 to 15 November 1853 as the husband and co-ruler of Queen Maria II.
In keeping with Portuguese law, Ferdinand only became king after the birth of his first son, Prince Pedro, in 1837. Ferdinand's reign came to an end with the death of his wife in 1853, but he served as regent for his son and successor, King Pedro V, until 1855.
Fulk of Anjou (Latin: Fulco, French: Foulque or Foulques; c. 1089/1092 – 13 November 1143), also known as Fulk the Younger, was the king of Jerusalem from 1131 until 1143 as the husband and co-ruler of Queen Melisende. Previously, he was the count of Anjou as Fulk V from 1109 to 1129. He had also been the count of Maine from 1110 to 1126 alongside his first wife, Countess Erembourg. His direct descendants were the rulers of the Angevin Empire and the Latin Kingdom of Jerusalem.
John I (Breton: Yann, French: Jean; c. 1217/1218 – 8 October 1286), known as John the Red due to the colour of his beard, was Duke of Brittany from 1221 to his death and 2nd Earl of Richmond in 1268.
John was the eldest of three children born to Duchess Alix and her husband and co-ruler, Duke Peter I. He became duke upon his mother's death in 1221. His father, who had reigned as duke due to his marriage to Alix, ruled as regent until John reached adulthood. In 1268, Henry III granted the earldom of Richmond to John, and the title continued in his family, through frequent temporary forfeitures and reversions, until 1342.
Guy of Lusignan (c. 1150 – 1194) was king of Jerusalem, first as the husband and co-ruler of Queen Sibylla from 1186 to 1190, then as disputed ruler from 1190 to 1192. He was also lord of Cyprus from 1192 to 1194. As king, Guy was highly unpopular amongst the nobles of the Kingdom of Jerusalem, and is often blamed for the fall of the kingdom to Saladin.
A Frankish Poitevin knight, Guy was the youngest son of Hugh VIII of Lusignan and the younger brother of Aimery of Lusignan. After killing Patrick, 1st Earl of Salisbury, in a failed attempt to kidnap Eleanor of Aquitaine, he was banished from Poitou. After arriving in the Holy Land at an unknown date from 1173 to 1180, Guy was hastily married to Sibylla, the sister of Baldwin IV of Jerusalem, in 1180 to prevent a political coup. As Baldwin's health deteriorated due to his leprosy, he appointed Guy as regent in 1183. However, Guy proved to be unpopular and incompetent as a leader, and Baldwin IV resumed power later that year. He stripped Guy of his inheritance, naming Baldwin V, Sibylla's son by her first husband William, as his co-king and eventual successor instead. Baldwin IV died in 1185, followed shortly by the sickly Baldwin V in 1186, leading to the succession of Sibylla. Sibylla was told to annul her marriage to Guy in order to ascend to the throne on the condition that she would be allowed to pick her next husband, but astonished the court by choosing to remarry and crown Guy. Guy's reign was marked by increased hostilities with the Ayyubids, ruled by Saladin, culminating in the Battle of Hattin in July 1187—during which Guy was captured—and the fall of Jerusalem itself three months later.