Title: Isabella of Aragon, Queen of Portugal
Content:  Isabella was the eldest child of Ferdinand II of Aragon and Isabella I of Castile. Born during the reign of her uncle, Henry IV of Castile, the early years of her life were defined by the tension between him and her mother, as her uncle would not forgive her mother for marrying Ferdinand without his permission. Upon the death of Henry IV in 1474, Isabella's mother claimed the throne of Castile, and the young Isabella was swiftly sworn as the heir presumptive to the throne. The early years of the reign of Isabella I were spent embroiled in a war of succession, as Henry IV had 
Title: Isabella of Portugal, Queen of Castile
Content:  Isabella of Portugal (Isabel in Portuguese and Spanish) (1428 – 15 August 1496) was Queen consort of Castile and León. She was the mother of Queen Isabella I "the Catholic". She was born as a scion of a collateral branch of the Aviz dynasty that had ruled Portugal since 1385. Her parents were John, Constable of Portugal, the youngest surviving son of John I of Portugal, and his half-niece and wife, Isabella of Barcelos, the daughter of the Duke of Braganza, an illegitimate son of the king.
Title: Isabella of Brittany
Content:  Isabella's maternal grandparents were Charles VI of France and Isabeau of Bavaria. Her paternal grandparents were John IV, Duke of Brittany and Joan of Navarre. Isabella was related to three Queens of England. Two of her maternal aunts, Isabella of Valois and Catherine of Valois were queens of England and after the death of her paternal grandfather, John IV, her grandmother, Joan, became queen of England by her marriage to Henry IV of England. Isabella of Valois was married to Henry's predecessor, Richard II of England. Catherine of Valois was married to Henry IV's son, Henry V of England.
Title: Isabella of Austria
Content:  Isabella of Austria (18 July 1501 – 19 January 1526), also known as Elizabeth, was queen of Denmark, Norway and Sweden as the wife of King Christian II. She was the daughter of King Philip I and Queen Joanna of Castile and the sister of Emperor Charles V. She was born at Brussels. She ruled Denmark as regent in 1520.
Title: Isabella II of Spain
Content:   Isabella was born in the Royal Palace of Madrid in 1830, the eldest daughter of King Ferdinand VII of Spain, and of his fourth wife and niece, Maria Christina of the Two Sicilies. She was entrusted to the royal governess María del Carmen Machín y Ortiz de Zárate. Queen Maria Christina became regent on 29 September 1833, when her three-year-old daughter Isabella was proclaimed sovereign following the death of Ferdinand VII. Isabella succeeded to the throne because Ferdinand VII had induced the Cortes Generales to help him set aside the Salic law, introduced by the Bourbons in the early 18th century, 
Title: Isabella of England
Content:  Isabella was born around 1214 as the fourth child and second daughter of John, King of England and his second wife Isabella of Angoulême. Her exact date of birth is unknown, and the year is calculated based on the fact that Matthew Paris reported that the princess got married at the age of 21. By the time Isabella was born, her parents' marriage had already started to unravel, and the princess spent most of the time with her mother. After the death of King John in 1216, Isabella remained in the full care of her mother and was with her until 1220, when Isabella of Angouleme remarried and left the English court. The princess was raised from an early age by the "nurse and governess" Margaret Biset, who received for her services from 1219, 
Title: Isabella of Angoulême
Content:   Isabella of Angoulême (Isabelle, ; c. 1186/1188 – 4 June 1246) was Queen of England as the second wife of King John from 1200 until John's death in 1216. She was also suo jure Countess of Angoulême from 1202 until 1246. Isabella had five children by the king, including his heir, later Henry III. In 1220, Isabella married Hugh X of Lusignan, Count of La Marche, by whom she had another nine children. Some of Isabella's contemporaries, as well as later writers, claim that Isabella formed a conspiracy against King Louis IX of France in 1241, after being publicly snubbed by his mother, Blanche of Castile, for whom she had a deep-seated hatred. In 1244, after the plot had failed, Isabella was accused of attempting to poison the king. To avoid arrest, she sought refuge in Fontevraud Abbey, where she died two years later, but none of this can be confirmed.
Title: Princess Isabella of Parma
Content:  Born Isabella Maria Luisa Antonietta Ferdinanda Giuseppina Saveria Dominica Giovanna at Buen Retiro Palace in Madrid, Isabella was an Infanta of Spain and grew up at the court of her grandfather, Philip V of Spain. Her father was the Spanish Prince Philip, who was Duke of Parma in Italy. Her mother was the 14-year-old Élisabeth of France, the eldest daughter of Louis XV of France. Isabella's parents' marriage was not happy, and for nearly 10 years Isabella remained an only child. Isabella was very close to her mother and was distraught when she died of smallpox in 1759. Henceforth, Isabella was convinced she would die young, as well.
Title: Isabella (given name)
Content:  Viscountess of Béarn ; Isabella, Duchess of Lorraine (1400–1453), Queen of Naples ; Isabella of Bourbon (1436–1465), Countess Consort of Charolais ; Isabella I of Castile (1451–1504, "Queen Isabella of Spain"), Queen of Castile and León, wife of Ferdinand II of Aragon ; Isabella of Aragon, Queen of Portugal (1470–1498), Princess of Asturias ; Isabella of Aragon, Duchess of Milan (1470–1524), Princess of Naples, Duchess Consort of Milan ; Isabella d'Este (1474-1539), Marchesa of Mantua ; Isabella II of Spain (1830-1904), queen regnant of Spain from 1843 until 1868 ; Isabella, Princess of Asturias (1851–1931), daughter of Queen Isabella II ; Princess Isabella of Denmark (born 2007), daughter of Crown Prince Frederick and Crown Princess Mary of Denmark 
Title: Isabella of Aragon, Queen of France
Content:  Isabella was the eighth child and youngest daughter of King James I of Aragon and his second wife, Violant of Hungary. Her exact date of birth was not recorded, but she certainly was born in late 1247 or early 1248 since her father, who financially supported the Monastery of Santa María de Sigena, stipulated in his will in January 1248 that if he had another son, he should become a knight Templar and if the child was a daughter, she should enter Santa María de Sigena as a nun. The will was certainly abandoned before Isabella's birth because she was married. On 11 May 1258, the Treaty of Corbeil was concluded between Isabella's father and King Louis IX of 

Question: who was queen isabella's mother?
Answer: Maria of Aragon, Queen of Portugal.