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Maria Laskarina (c. 1206- July, 1270) was a daughter of Theodore I Laskaris and his first wife Anna Angelina.

She was a younger sister of Irene Lascarina, first Empress consort of John III Doukas Vatatzes. Theodore married his eldest daughter to his designated heir in 1212. Theodore was widowed in the same year and proceeded to marriages with Philippa of Armenia and Marie de Courtenay. However John was never displaced in succession.

As a younger daughter, the marriage of Maria was not intended to add a potential husband in the line of succession to the throne. Instead it secured a marital alliance with the Kingdom of Hungary.

In 1218, Maria was married to prince Béla of Hungary. Bride and groom were about twelve-years-old. Her husband was the eldest son of Andrew II of Hungary and Gertrude of Merania.

Andrew II died on 26 October 1235. The crown prince succeeded him as Béla IV and Maria became his Queen consort. Béla reigned for thirty-five years and died on 3 May 1270. Maria survived him by about two months.

Maria and Béla IV of Hungary had ten children:

• Margaret of Hungary (c. 1220 - 20 April 1242). Married Guillaume de Saint-Omer. Her husband is often listed in genealogies as "Lord of Thebes". However he might be confused with Bela de Saint-Omer, an older brother who held the the title jure uxoris.
• Kunegunda of Hungary (5 March 1224 - 24 July 1292), also known as Kinga. She was married to King Boleslaus V of Poland, after his death becoming a nun and abbess; she was canonized by Pope John Paul II in 1999.
• Anna of Hungary (c. 1226 - after 1270). Married Rostislav of Slavonia.
• Catherine of Hungary. (c. 1229 - 1242). She died while fleeing with her family following the Battle of Mohi.
• Elizabeth of Hungary (c. 1236 - 24 October 1271). Married Henry XIII, Duke of Bavaria.
• Constance of Hungary (c. 1237 - after 1252). Married Leo I of Halych.
• Yolanda of Hungary (c. 1238 - 1298). Married Boleslaus of Greater Poland. Later became a nun and abbess, who has been declared as a candidate for sainthoood.
• Stephen V of Hungary (December, 1239 - 6 August 1272).
• Saint Margaret of Hungary (27 January 1242 - 18 January 1271). Named after a an older sister. Canonized by the Roman Catholic Church in 1943, for whom Margaret Island in Budapest is named, having been the place where a royal monastery was established by her parents for her.
• Béla, Duke of Slavonia, Croatia and Dalmatia (c. 1243 - 1269). Married Kunigunde of Brandenburg, a daughter of Otto III, Margrave of Brandenburg. His widow married Waleran IV of Limburg.

• Her listing along with her husband and children
• Listing of descendants of Géza I of Hungary, including her husband and children
• A listing of the Lords of Thebes, mentioning her son-in-law