Odon of Poznań
Odon of Poznań, also known as Odon of Greater Poland and Mieszkowic,( – 20 April 1194) was a Duke of Greater Poland and Poznań during 1177 – 1182, and Duke of Kalisz from 1193 to 1194.
He was the oldest son of Mieszko III the Old, Duke of Greater Poland( and since 1173, High Duke of Poland) by his first wife, Elisabeth, who was the daughter of King Béla II of Hungary.
Marguerite Poland
Marguerite Poland( born 3 April 1950, Johannesburg) is a South African writer and author of eleven children's books.
Euphrosyne of Greater Poland
Euphrosyne of Greater Poland( 1247/50 – 17/19 February 1298) was a Greater Poland princess, member of the House of Piast and abbess of St. Clara in Trzebnica.
She was the second daughter of Przemys ł I, Duke of Greater Poland and Poznań, by his wife Elisabeth, daughter of Henry II the Pious, Duke of Wrocław.
Euphemia of Greater Poland (1253–1298)
Euphemia of Greater Poland( 1253 – 5 September 1298) was a Greater Poland princess member of the House of Piast and nun at St. Clara in Wrocław.
She was the fourth daughter( twin with Anna) of Przemys ł I, Duke of Greater Poland and Poznań, by his wife Elisabeth, daughter of Henry II the Pious, Duke of Wrocław.
She was named after her paternal aunt Euphemia, wife of Władysław, Duke of Opole.
In sources, and like almost all the Piast princesses who bear that name, Euphemia was also called with the diminutive" Ofka".
Salome of Greater Poland
Salome of Greater Poland also known as Salomea Odonicówna( literally daughter of Odonic)( b. – d. April 1267?), was a Polish princess member of the Piast dynasty from the Greater Poland branch and by marriage Duchess of Glogów.
She was the third child but eldest daughter of Duke Władysław Odonic of Greater Poland by his wife Jadwiga.
Władysław Odonic
Władysław (also named Włodzisław) Odonic (nicknamed Plwacz)  (– 5 June 1239) was a Duke of Kalisz 1207–1217, Duke of Poznań 1216–1217, ruler of Ujście in 1223, ruler of Nakło from 1225, and Duke of all Greater Poland 1229–1234; from 1234 until his death he was ruler over only the north and east of the Warta river
(some historians believed that shortly before his death, he lost Ujście and Nakło).
He was a son of Odon, Duke of Kalisz, by his wife Viacheslava, daughter of Yaroslav Vladimirovich "Osmomysl", Prince of Halych.
Władysław was probably named after either his paternal uncle Władysław III Spindleshanks or his ancestor Władysław I Herman.
The nickname Plwacz  was already given to him in the 13th century chronicles.
It is unknown if he received that nickname because of a disease that affected his throat or because he had bad manners.
Another nickname used in the contemporary sources was Odonic, a corruption of his patronymic "Odowicson of Odon"); it is also unknown why the sources persisted in using the erroneous form instead of the correct one.
Obata Toramori
He was the father of Obata Masamori.
Anna of Greater Poland
Anna of Greater Poland( b. 1253 – d. aft. 26 June 1295), was a Greater Poland princess member of the House of Piast and abbess at Owińska.
She was the third daughter( twin with Euphemia) of Przemys ł I, Duke of Greater Poland and Poznań, by his wife Elisabeth, daughter of Henry II the Pious, Duke of Wrocław.
She named after her maternal grandmother, Anna of Bohemia.
Constance of Greater Poland
Constance of Greater Poland( also known as of Poznań)( 1245/46 – 8 October 1281) was a princess of Greater Poland, a member of the House of Piast, and by marriage a Margravine of Brandenburg – Stendal.
She was the eldest daughter of Przemys ł I, Duke of Greater Poland and Poznań, by his wife Elisabeth, daughter of Henry II the Pious, Duke of Wrocław.
She was probably named after her maternal aunt Constance, second wife of Casimir I, Duke of Kuyavia.
Euphemia of Greater Poland
Euphemia of Greater Poland
(c. 1230 – 15 February after 1281), was a Polish princess member of the House of Piast from the Greater Poland branch and by marriage was Duchess of Kalisz, Wieluń and Opole-Racibórz.
Euphemia was the youngest child of Władysław Odonic and his wife Jadwiga, disputed daughter of Mestwin I, Duke of Pomerania and Swinisław, daughter of Mieszko III the Old.
Euphemia's date of birth is unknown.
In literature it claims Euphemia was born around 1230.
It is most likely she was born between (1226–1230), fitting in with the dates of birth of her siblings and dates of death of her parents.

Question: What is the place of birth of Euphemia Of Greater Poland's father?
Answer: Poznań