Bela III of Hungary (Hungarian III. Béla, Slovak: Belo III), born in 1148, was King of Kingdom of Hungary circa 1172-1196. He was the son of King Geza II of Hungary and Euphrosyne (daughter of Grand Duke Mstislav of Kiev). As a boy he was sent to Constantinople to be educated in the court of the Emperor. Bela III succeeded his brother Stephen III of Hungary and was crowned under the influence of his father-in-law, the Byzantine Emperor Manuel I Comnenus. Bela III married: Events Ramon Berenguer IV, Count of Barcelona conquered Tortosa in posetion of the moors. ... The Kingdom of Hungary is the name of a multiethnic kingdom that existed in Central Europe from 1000 to 1918. ... Mstislav I Vladimirovich the Great (Мстислав Владимирович Великий in Russian) (June 1, 1076 — April 14, 1132), Grand Prince of Kiev (1125-1132), the eldest son of Vladimir Monomakh by Gytha of Wessex. ... This is a list of Byzantine Emperors. ... Fresco of Manuel I Manuel I Comnenus Megas (November 28, 1118? - September 24, 1180) was Byzantine Emperor from 1143 to 1180. ...

• Maria Comnena, daughter of Emperor Manuel I Comnenus, with no issue. They were engaged in 1163, separated in 1169.
• Agnes de Chatillon (1154-1184), daughter of Raynald of Chatillon and Constance of Antioch (joint princes of Antioch). They married in 1172 with issue:

1. King Emeric of Hungary (1174-1204)
2. Margareta of Hungary (1175-1223), married Emperor Isaac II Angelus and Boniface of Montferrat.
3. King Andrew II of Hungary (1176-1235)
4. Soloman, died young
5. István, died young
6. Konstancia of Hungary (1180-1198), married King Otakar II of Bohemia

• Marguerite of France, daughter of King Louis VII of France, married in 1186, with no issue.

Through his son Andrew II, he is the ancestor of Edward III of England through Isabella of France. He is therefore an ancestor to the present-day British royal family including Elizabeth II of the United Kingdom of Great Britain and Northern Ireland. Fresco of Manuel I Manuel I Comnenus Megas (November 28, 1118? - September 24, 1180) was Byzantine Emperor from 1143 to 1180. ... Raynald of Châtillon (also Reynald or Reginald of Chastillon) (died July 4, 1187) was a knight who served in the Second Crusade and remained in the Holy Land after its defeat. ... Constance Guiscard (1127-1163) was the ruler of the principality of Antioch (a crusader state) from 1130 to her death. ... The Principality of Antioch, including parts of modern-day Turkey and Syria, was one of the crusader states created during the First Crusade. ... Emeric (or Imre) was a Hungarian king (1174–1204), who ruled from 1196 to 1204. ... Isaac II Angelus, Byzantine emperor 1185-1195, and again 1203-1204, was the successor of Andronicus I. He inaugurated his reign by a decisive victory over the Normans in Sicily, but elsewhere his policy was less successful. ... Boniface of Montferrat (died 1207) was marquis of Montferrat and the leader of the Fourth Crusade. ... Andrew II (1175-1235) (Hungarian: , Slovak: Ondrej II) was a son of Bela III of Hungary and succeeded his nephew, the infant Ladislaus III, in 1205. ... Otakar II (also spelled Ottokar or Přemysl Otakar/Ottokar) (c. ... Marguerite of France (1282 – 14 February 1317) was the second queen consort of King Edward I of England. ... Louis VII the Younger (French: Louis VII le Jeune) (1120 - September 18, 1180) was King of France from 1137 to 1180. ... Edward III (13 November 1312 – 21 June 1377) was one of the most successful English Kings of medieval times. ... Isabella of France (~1292 - August 22, 1358), known as the She-Wolf of France, was the Queen consort of Edward II of England. ... Her Majesty Queen Elizabeth II (Elizabeth Alexandra Mary) (born 21 April 1926), styled HM The Queen, is the Queen regnant and Head of State of the United Kingdom, as well as the Queen of Antigua and Barbuda, Australia, The Bahamas, Barbados, Belize, Canada, Grenada, Jamaica, New Zealand, Papua New Guinea... Northern Ireland is an administrative region and one of four constituent parts of the United Kingdom. ...