Elena Alistar
Elena Alistar- Romanescu( June 1, 1873 in Vaisal, Ismail County – 1955 in Pucioasa) was a Bessarabian physician and politician who was part of Sfatul Țării from Bessarabia.
She was the aunt of writer Magda Isanos.
Alice Clere
Alice Clere( died 1538) was the daughter of Sir William Boleyn and his wife Margaret Ormond( otherwise Butler), the daughter and co-heiress of Thomas Butler, 7th Earl of Ormond.
Alice was thus the sister of Thomas Boleyn, 1st Earl of Wiltshire, and the aunt of King Henry VIII's second Queen, Anne Boleyn.
Princess Gyeguk
Grand Princess Gyeguk(? – 1315)( 계국대장공주," Princess- Aunt of the State of Gye"), also known as Grand Princess Hanguk, was queen consort to king Chungseon of Goryeo.
After Jeguk, she was the second Mongol queen( from the Yuan dynasty) of Goryeo.
Princesses qualified as were aunts of the emperor.
She was the aunt of two emperors: Buyantu Khan and Külüg Khan.
Joyce Young
Joyce Young( born c. 1925) is a Canadian woman famous for a single act of philanthropy.
She is the wife of Bill Young, a retired Major in the Canadian Armed Forces and the aunt of Red Hat, Inc. founder Bob Young.
Thomas Chaucer
Thomas Chaucer (c. 136718 November 1434) was Speaker of the House of Commons and son of Geoffrey Chaucer, the poet, by his wife Philippa Roet.
Kawamura Sumiyoshi
Count, was an admiral in the Imperial Japanese Navy.
Kawamura's wife Haru was the aunt of Saigō Takamori.
Emel Say
Emel Say( 1927 – 17 February 2011) was a Turkish painter.
She is the daughter of painter Zehra Say and the aunt of pianist Fazıl Say.
Nola Fairbanks
Nola Fairbanks( born Nola Jo Modine; December 10, 1924) is an American actress.
She is also the aunt of actor Matthew Modine.
Maria Messina
Maria Messina (Palermo, March 14, 1887 – Pistoia, January 19, 1944) was an Italian writer.
She was the aunt of the writer Annie Messina (daughter of Maria's brother Salvatore).
Philippa Roet
Philippa de Roet (1346 – c. 1387) (also known as Philippa Pan or Philippa Chaucer) was the sister of Katherine Swynford, third wife of John of Gaunt, Duke of Lancaster (a son of King Edward III) and was the wife of the poet Geoffrey Chaucer.

Question: Who is Thomas Chaucer's aunt?
Answer: Katherine Swynford