Irene Palaiologina (Byzantine empress)
Irene Palaiologina( died after 1356), was the Empress consort of Matthew Kantakouzenos.
Maria Sundbom
Maria Irene Sundbom( born 19 May 1975, in Uppsala) is a Swedish actress.
She belongs to the ensemble of Uppsala City Theatre.
Andronikos III Palaiologos
Andronikos III Palaiologos (25 March 1297 – 15 June 1341), commonly Latinized as Andronicus III Palaeologus, was the Byzantine emperor from 1328 to 1341.
Born Andronikos Doukas Angelos Komnenos Palaiologos , he was the son of Michael IX Palaiologos and Rita of Armenia.
He was proclaimed co-emperor in his youth, before 1313, and in April 1321 he rebelled in opposition to his grandfather, Andronikos II Palaiologos.
He was formally crowned co-emperor in February 1325, before ousting his grandfather outright and becoming sole emperor on 24 May 1328.
His reign included the last failed attempts to hold back the Ottoman Turks in Bithynia and the defeat at Rusokastro against the Bulgarians, but also the successful recovery of Chios, Lesbos, Phocaea, Thessaly, and Epirus.
His early death left a power vacuum that resulted in the disastrous civil war between his Empress-dowager, Anna of Savoy, and his closest friend and supporter, John VI Kantakouzenos.
Maria-Irene Palaiologina
Irene Palaiologina (Irina; Ειρήνη Παλαιολογίνα) (1327 - after 1356) was a Byzantine princess and Bulgarian empress consort.
She was also known as Maria Palaiologina (Μαρία Παλαιολογίνα).
Her parents were Andronikos III Palaiologos and Anna of Savoy, whilst her siblings were John V Palaiologos and Michael Palaiologos.
She married in 1336 Tsar Michael Asen IV of Bulgaria.
Nothing else is known about her, except that she was an Orthodox Christian.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Maria Stencel
Maria Irene Stencel( January 11, 1900 – April 6, 1985) was a registered nurse from Poland who was a recipient of the International Florence Nightingale Medal in 1961.
Dorothea Liebermann-Meffert
Dorothea Maria Irene Liebermann- Meffert( born 6 May 1936) is a German surgeon and professor of surgery at the Technical University of Munich.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Kaya Alp
Kaya Alp was, according to Ottoman tradition, the son of Kızıl Buğa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertuğrul, and the great grandfather of the Ottoman Empire founder, Osman I.

Question: Who is Maria-Irene Palaiologina's paternal grandfather?
Answer: Michael IX Palaiologos