Euphemia of Racibórz
Euphemia of Racibórz( 1299/1301 – 17 January 1359) was a Polish princess member of the House of Piast in the Racibórz branch and Dominican Prioress in Racibórz.
She was the third child but second daughter of Duke Przemysław of Racibórz by his wife Anna, daughter of Konrad II of Masovia.
Konrad II of Masovia
Konrad II of Czersk (pl: "Konrad II czerski"; c. 1250 – 24 June/21 October 1294), was a Polish prince member of the House of Piast, Duke of Masovia during 1264-1275 jointly with his brother, since 1275 sole ruler over Czersk and Duke of Sandomierz during 1289.
He was the eldest son of Siemowit I of Masovia and Pereyaslava, a daughter of Prince Daniel of Halych.
Anna of Masovia
Anna of Masovia( c. 1498 – after 26 January 1557 in Jaroslaw) was Princess of Mazovia and a member of the House of Piast.
She was the last representative of the line of Masovian- Piast.
She was the second daughter of Konrad III of Masovia and Anna Radziwiłł.
She was a sister of Dukes Janusz III of Masovia and Stanislaus of Masovia, and Sophia, who married Stephen VII Báthory.
Siemowit I of Masovia
Siemowit I of Masovia  (c. 1224/28 – 23 June 1262), was a Polish prince member of the House of Piast, Duke of Czersk during 1247-1248, Duke of Masovia (except Dobrzyń) during 1248-1262, ruler over Sieradz during 1259-1260.
He was the sixth son of Konrad I of Masovia and his wife Agafia of Rus.
He was named after his older brother Siemowit, who died young in 1224.
Sophia of Masovia
Sophia of Masovia( 1497/1498- before 11 March 1543) was a Princess of Masovia, daughter of Konrad III Rudy, Duke of Masovia and his wife Anna Radziwiłł.
She was a member of the House of Piast.
On 17 September 1520 in Warsaw, Sophia was married by proxy to Stephen VII Báthory.
On 17 January 1521, Sophia and her entourage went to Hungary, where in February there was a formal marriage.
The couple had three children:
Anna, Stephen and Klara; however, other sources claim that Klara was the couple's only child.
Klara was engaged to Carl, Duke of Münsterberg, but died in 1535, before the marriage took place.
After the death of Stephen in 1530, Sophia was married to Croatian magnate Louis Pekry.
Sophia's second marriage was childless.
She then died sometime before 11 March 1543.
Sophia had three siblings: Stanislaus I of Masovia, Janusz III of Masovia and Anna of Masovia, both her brothers died childless and so Anna and Sophia were the last Masovian Piasts.
Soon after Janusz's death, the Duchy of Masovia was annexed into the kingdom of Poland, despite resistance from some of the Masovian nobility.
They tried to retain their independence and argued that the Duchy should be inherited by the female relatives( such as Anna or Sophia).
The Polish king refused to recognize their demands.
Anna was made titular Duchess of Masovia.
Anna of Masovia, Duchess of Racibórz
Anna of Masovia( c. 1270- after July 13, 1324) was a Princess of Masovia and was a member of the House of Piast.
She was the daughter and only child of Konrad II of Masovia and Hedwig, daughter of Bolesław II the Bald.
Between 1289 and 1290 Anna married Przemysław of Racibórz.
Anna was Duchess of Racibórz along with her unnamed sister- in- law.
She was then widowed May 7, 1306.
With her husband, Anna had the following children:
Is also believed that Constance, who ruled in Wodzisław Śląski until her death in 1351 was also her daughter.
When her son Leszek was old enough to exercise power over the principality, Anna probably moved to Wodzislaw where she lived with the consent of her son.
She lived with her supposed third daughter Constance.
After her death, Anna was buried in Raciborz, presumably the Dominican Church or the Dominican monastery.
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.
Diana Guardato
Diana Guardato was a member of the aristocratic Patrician Guardato family, and had three children with King Ferdinand I: Diana Guardato is the 16th- Great Grandmother of His Royal Highness Albert II of Belgium, 15th- Great Grandmother of His Majesty Juan Carlos
I of Spain, 17th- Great Grandmother of Philippe of Belgium, 14th- Great Grandmother of His Majesty Manuel II of Portugal, 16th- Great Grandmother of Grand Duke Henri, as well as many others.
Gülbahar Hatun (wife of Mehmed II)
Gülbahar Hatun( 1432 – 1492) was the consort of Sultan Mehmed II, and mother of Sultan Bayezid II of the Ottoman Empire and the grandmother of Selim I.
Siemowit III, Duke of Masovia
Siemowit III of Masovia( his name also rendered Ziemowit; – 1381) was a prince of Masovia and a co-regent( with his brother Casimir I of Warsaw) of the lands of Warsaw, Czersk, Rawa, Gostynin and other parts of Masovia.

Question: Who is the paternal grandmother of Konrad Ii Of Masovia?
Answer: Agafia of Rus