Domnall Ua Lochlainn
Domhnall Ua Lochlainn( old spelling: Domnall Ua Lochlainn)( 1048 – 10 February 1121), also known as Domhnall Mac Lochlainn( old spelling: Domnall Mac Lochlainn), claimed to be High King of Ireland.
Marya Chéliga-Loevy
Marya Chéliga- Loevy( or Maria Szeliga, 1854 – 2 January 1927) was a Polish author, playwright, feminist and pacifist.
She was born in Poland but spent much of her life in France.
María do Céu
Maria do Céu da Silva Lopes Federer or Maria do Ceu( born 1957) is an East Timor aid worker and politician who was a presidential candidate in the 2012 election.
Domhnall Ua Dubhthaigh
Domhnall Ua Dubhthaigh, Archbishop of Connacht, died 1136.
The post of Archbishop of Connacht was a precursor to that of Archbishop of Tuam.
His death is noted in the Annals of the Four Masters as follows:" Domhnall Ua Dubhthaigh, Archbishop of Connaught, and successor of Ciaran, head of the wisdom and hospitality of the province, died after mass and celebration at Cluain- fearta- Brenainn."
The Annals of Loch Cé have his obit" sub anno" 1137, describing him as Domhnall Ua Dubhthaigh, bishop of Elphin, and comarb of Ciaran of Cluain- mic- Nois.
Maria Ann Lovell
Maria Ann Lovell or Maria Lovell;
Maria Lacy; Maria Ann Lacy( 1803 – 1877) was an English actress and playwright.
Maria Oeyen
Maria Oeyen( 31 August 1930 – 24 April 2018) was a Belgian swimmer.
She competed in the women's 4 × 100 metre freestyle relay at the 1948 Summer Olympics.
Marie Forså
Marie Forså or Maria Lynn( born Inga Forså, 13 December 1956 in Farsta) is a Swedish actress active in Europe the mid-1970s.
Mona Maris
Mona Maris (born Mona Maria Emita Capdeville or Maria Rose Amita Capdeville, November 7, 1903 – March 23, 1991) was an Argentine film actress.
Argentina Santos
Argentina Santos or Maria Argentina Pinto dos Santos (February 6, 1924 – November 18, 2019) was a Portuguese singer considered one of the last great Fado singers.
Domhnall Ua Buachalla
Domhnall Ua Buachalla (5 February 1866 – 30 October 1963) was an Irish politician and member of the First Dáil who served as third and final Governor-General of the Irish Free State and later served as a member of the Council of State.

Question: Who died first, Maria Oeyen or Domhnall Ua Buachalla?
Answer: Domhnall Ua Buachalla