Princess Beatrice of the United Kingdom
Princess Beatrice of the United Kingdom, (Beatrice Mary Victoria Feodore; later Princess Henry of Battenberg; 14 April 1857 – 26 October 1944) was the fifth daughter and youngest child of Queen Victoria and Prince Albert.
Beatrice was the last of Queen Victoria's children to die, 66 years after the first, her elder sister Alice.
Beatrice's childhood coincided with Queen Victoria's grief following the death of her husband on 14 December 1861.
As her elder sisters married and left their mother, the Queen came to rely on the company of her youngest daughter, whom she called "Baby" for most of her childhood.
Beatrice was brought up to stay with her mother always
and she soon resigned herself to her fate.
The Queen was so set against her youngest daughter marrying that she refused to discuss the possibility.
Nevertheless, many suitors were put forward, including Louis Napoléon, Prince Imperial, the son of the exiled Emperor Napoleon III of France, and Louis IV, Grand Duke of Hesse, the widower of Beatrice's older sister Alice.
She was attracted to the Prince Imperial and there was talk of a possible marriage, but he was killed in the Anglo-Zulu War in 1879.
Beatrice fell in love with Prince Henry of Battenberg, the son of Prince Alexander of Hesse and by Rhine and Julia von Hauke and brother-in-law of her niece Princess Victoria of Hesse and by Rhine.
After a year of persuasion, the Queen, whose consent was required pursuant to the Royal Marriages Act, finally agreed to the marriage, which took place at Whippingham on the Isle of Wight on 23 July 1885.
Queen Victoria consented on condition that Beatrice and Henry make their home with her and that Beatrice continue her duties as the Queen's unofficial secretary.
The Prince and Princess had four children, but 10 years into their marriage, on 20 January 1896, Prince Henry died of malaria while fighting in the Anglo-Asante War.
Beatrice remained at her mother's side until Queen Victoria died on 22 January 1901.
Beatrice devoted the next 30 years to editing Queen Victoria's journals as her designated literary executor and continued to make public appearances.
She died at 87, outliving all her siblings, two of her children, and several nieces and nephews including George V and Wilhelm II.
Hubba bint Hulail
Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic" Nabī"( Prophet) Muhammad ibn Abdullah.
Beatrice Bhadrayuvadi
Princess Beatrice Bhadrayuvadi
( 5 December 1876 – 30 September 1913), was a Princess of Siam( later Thailand).
She was a member of Siamese Royal Family.
She is a daughter of Chulalongkorn.
Her name was given by her father, King Chulalongkorn, in honour of British Queen Victoria's daughter, The Princess Beatrice.
Her mother was The Noble Consort( Chao Chom Manda) Saeng Galyanamitra( daughter of Phraya Jayavichit, son of Chao Phraya Nikara Bodindra( To) who built Galyanamitra Temple.
Princess Beatrice Bhadrayuvadi had 3 full siblings; 2 elder brothers and 1 younger sister; Princess Beatrice Bhadrayuvadi died 30 September 1913 at age of only 36.
Susan Barrantes
Susan Mary Barrantes(" née" Wright, previously Ferguson; 9 June 1937 – 19 September 1998) was the mother of Sarah, Duchess of York, and the maternal grandmother of Princess Beatrice of York and Princess Eugenie of York.
She was known as" the bolter," following her elopement with an Argentinian polo player, causing a stir in social circles.
After his death, she became a film producer in Buenos Aires, but was killed in a road accident.
Tjuyu
Tjuyu( sometimes transliterated as Thuya or Thuyu) was an Egyptian noblewoman and the mother of queen Tiye, and the wife of Yuya.
She is the grandmother of Akhenaten, and great grandmother of Tutankhamun.
Prince Ataúlfo de Orleans
Ataúlfo de Orleans( 20 October 1913 – 8 October 1974), was a Spanish prince, the youngest son of Infante Alfonso, Duke of Galliera and Princess Beatrice of the United Kingdom.
He was President of Real Club de la Puerta de Hierro from 1962 to 1966.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Queen Victoria
Victoria (Alexandrina Victoria; 24 May 1819 – 22 January 1901) was Queen of the United Kingdom of Great Britain and Ireland from 20 June 1837 until her death.
On 1 May 1876, she adopted the additional title of Empress of India.
Known as the Victorian era, her reign of 63 years and seven months was longer than that of any of her predecessors.
It was a period of industrial, cultural, political, scientific, and military change within the United Kingdom, and was marked by a great expansion of the British Empire.
Victoria was the daughter of Prince Edward, Duke of Kent and Strathearn (the fourth son of King George III), and Princess Victoria of Saxe-Coburg-Saalfeld.
After both the Duke and his father died in 1820, she was raised under close supervision by her mother and her comptroller, John Conroy.
She inherited the throne aged 18 after her father's three elder brothers died without surviving legitimate issue.
The United Kingdom was an established constitutional monarchy in which the sovereign held relatively little direct political power.
Privately, she attempted to influence government policy and ministerial appointments; publicly, she became a national icon who was identified with strict standards of personal morality.
Victoria married her cousin Prince Albert of Saxe-Coburg and Gotha in 1840.
Their children married into royal and noble families across the continent, earning Victoria
the sobriquet "the grandmother of Europe" and spreading haemophilia in European royalty.
After Albert's death in 1861, Victoria plunged into deep mourning and avoided public appearances.
As a result of her seclusion, republicanism in the United Kingdom temporarily gained strength, but in the latter half of her reign, her popularity recovered.
Her Golden and Diamond Jubilees were times of public celebration.
She died on the Isle of Wight in 1901.
The last British monarch of the House of Hanover, she was succeeded by her son Edward VII of the House of Saxe-Coburg and Gotha.
Edoardo Mapelli Mozzi
Edoardo Alessandro Mapelli Mozzi( born 19 November 1983) is a British property developer.
He is the founder and chief executive of Banda, a property development and interior design company.
Since September 2019, he has been engaged to Princess Beatrice of York.
Prince Henry of Battenberg
Prince Henry of Battenberg( Henry Maurice; 5 October 1858 – 20 January 1896) was a morganatic descendant of the Grand Ducal House of Hesse.
He became a member of the British Royal Family by marriage to Queen Victoria's youngest child, Princess Beatrice of the United Kingdom.

Question: Who is the maternal grandmother of Princess Beatrice Of The United Kingdom?
Answer: Princess Victoria of Saxe-Coburg-Saalfeld