Maria Laskarina
Maria Laskarina (c. 1206 – 16 July or 24 June 1270) was a Queen consort of Hungary by marriage to Béla IV of Hungary.
She was the daughter of Theodore I Laskaris and Anna Angelina.
Stephen II Báncsa
Stephen( II) from the kindred Báncsa( died 1278) was a Hungarian prelate in the 13th century, who served as Archbishop of Kalocsa from 1266 until his death.
He was a staunch supporter of Stephen V of Hungary.
Mary of Hungary, Queen of Naples
Mary of Hungary( c. 1257 – 25 March 1323), of the Árpád dynasty, was Queen consort of the Kingdom of Naples.
She was a daughter of Stephen V of Hungary and his wife Elizabeth the Cuman.
Mary served as Regent in Provence in 1290 – 1294 and in Naples in 1295 – 96, 1296 – 98, and 1302, during the absences of her consort.
Vecelin
Vecelin, also Vecellin and Vencellin, was a prominent military commander of Stephen I of Hungary at the end of the 10th and the beginning of the 11th century.
He was of Bavarian origin and came from a city named as either Wasserburg or Weissenburg.
Stephen V of Hungary
Stephen V (before 18 October 1239 – 6 August 1272, Csepel Island) was King of Hungary and Croatia between 1270 and 1272, and Duke of Styria from 1258 to 1260.
He was the oldest son of King Béla IV and Maria Laskarina.
King Béla had his son crowned king at the age of six and appointed him Duke of Slavonia.
Still a child, Stephen married Elizabeth, a daughter of a chieftain of the Cumans whom his father settled in the Great Hungarian Plain.
King Béla appointed Stephen Duke of Transylvania in 1257 and Duke of Styria in 1258.
The local noblemen in Styria, which had been annexed four years before, opposed his rule.
Assisted by King Ottokar II of Bohemia, they rebelled and expelled Stephen's troops from most parts of Styria.
After Ottokar II routed the united army of Stephen and his father in the Battle of Kressenbrunn on 12 July 1260, Stephen left Styria and returned to Transylvania.
Stephen forced his father to cede all the lands of the Kingdom of Hungary to the east of the Danube to him and adopted the title of junior king in 1262.
In two years, a civil war broke out between father and son, because Stephen accused Béla of planning to disinherit him.
They concluded a peace treaty in 1266, but confidence was never restored between them.
Stephen succeeded his father, who died on 3 May 1270, without difficulties, but his sister Anna and his father's closest advisors fled to the Kingdom of Bohemia.
Ottokar II invaded Hungary in the spring of 1271, but Stephen routed him.
In next summer, a rebellious lord captured and imprisoned Stephen's son, Ladislaus.
Shortly thereafter, Stephen unexpectedly fell ill and died.
Elizabeth the Cuman
Elizabeth the Cuman( 1244- 1290) was the Queen consort of Stephen V of Hungary.
She was regent of Hungary during the minority of her son in 1272- 1277.
The Cumans were the western tribes of the Cuman- Kipchak confederation.
Her people followed a shamanist religion and were considered pagans by contemporary Christians of Europe.
Thomas Baksa
Thomas( III) from the kindred Baksa( died 1287) was a Hungarian lord in the second half of the 13th century.
He was a supporter of Stephen V of Hungary.
Anna of Hungary (Byzantine empress)
Anna of Hungary( 1260 – 1281) was a Princess of Hungary and Croatia, the daughter of Stephen V of Hungary and Elizabeth the Cuman.
On 8 November 1273, Anna married Andronikos II Palaiologos.
According to George Pachymeres, the couple had two children:
Anna died before her husband became senior emperor in 1282.
However every Palaiologos emperor to the Fall of Constantinople in 1453 descended from her through her son Michael.
Gisela of Hungary
Gisela of Hungary( or Gisele, Gizella and of Bavaria; 985 – 7 May 1065) was the first queen consort of Hungary by marriage to Stephen I of Hungary, and the sister of Henry II, Holy Roman Emperor.
She has been beatified by the Roman Catholic church.
Catherine of Hungary, Queen of Serbia
Catherine of Hungary("/ Katalina"; c. 1256 – after 1314) was the second daughter of Stephen V of Hungary and his wife Queen Elizabeth, daughter of Seyhan, chieftain of the Cumans.
Catherine became Queen consort of Serbia by her marriage to Stephen Dragutin of Serbia.

Question: Who is the maternal grandfather of Stephen V Of Hungary?
Answer: Theodore I Laskaris