Constantine Doukas (co-emperor)
Constantine Doukas or Ducas ("Kōnstantinos Doukas"), (late 1074 – 1095) was Byzantine junior emperor from 1074–1078, and again from 1081–1087.
He was born to Emperor Michael VII and Empress Maria of Alania in late 1074, and elevated to junior emperor in the same year.
He was junior emperor until 1078, when Michael VII was replaced by Nikephoros III Botaneiates.
Because Constantine was not made junior emperor under Nikephoros III, his betrothal to Olympias, the daughter of Robert Guiscard, was broken, which Robert Guiscard used as a pretext to invade the Byzantine Empire.
John Doukas forced Nikephoros to abdicate to Alexios I Komnenos in 1081, and shortly after Alexios elevated Constantine to junior emperor under himself.
Constantine remained junior emperor until 1087, when Alexios had a son, John II Komnenos.
Constantine died in 1095.
Fatima bint Mubarak Al Ketbi
Fatima bint Mubarak Al Ketbi is the third wife of Sheikh Zayed bin Sultan Al Nahyan, the founder and inaugural president of United Arab Emirates, and late emir( ruler) of Abu Dhabi.
She is referred to as the mother of sheikhs and as the Mother of the UAE.
Constantine Doukas of Thessaly
Constantine Doukas, Latinized as Ducas, was ruler of Thessaly from to his death in 1303.
Lord Edmund Howard
Lord Edmund Howard( – 19 March 1539) was the third son of Thomas Howard, 2nd Duke of Norfolk, and his first wife, Elizabeth Tilney.
His sister, Elizabeth, was the mother of Henry VIII's second wife, Anne Boleyn, and he was the father of the king's fifth wife, Catherine Howard.
His first cousin, Margery Wentworth, was the mother of Henry's third wife, Jane Seymour.
Minamoto no Chikako
She was the mother of Prince Morinaga.
Julia Warhola
Julia Warhola( November 20, 1891 — November 22, 1972) was the mother of the American artist Andy Warhol.
Kekuʻiapoiwa II
Kekuʻiapoiwa II was a Hawaiian chiefess and the mother of the king Kamehameha I.
Trinidad Tecson
Trinidad Perez Tecson (November 18, 1848 – January 28, 1928), known as the "Mother of Biak-na-Bato" and "Mother of Mercy", fought to gain Philippines independence.
She was given the title "Mother of Biak-na-Bato" by Gen. Emilio Aguinaldo.
She was also cited as the "Mother of the Philippine National Red Cross" for her service to her fellow Katipuneros.
Lomawa Ndwandwe
laNgolotsheni( Lomawa) Ndwandwe( died September 1938) was the Ndlovukati( Queen Mother) of Swaziland, the wife of King Ngwane V, and the mother of King Sobhuza II.
Maria of Alania
Maria of Alania (born Martha; ; 1053-1118) was Byzantine empress by marriages to emperors Michael VII Doukas and Nikephoros III Botaneiates.
Her status as empress was considered a significant success for a newly unified Kingdom of Georgia, which would achieve regional influence comparable to that of Byzantium only during the reign of Martha's nephew, King David IV, who refused to carry a Byzantine title.
Maria was the only non-Byzantine empress of the eleventh century.

Question: Where was the mother of Constantine Doukas (Co-Emperor) born?