Title: Michael VII Doukas
Content:  Michael VII was born c. undefined 1050 in Constantinople, the eldest son of Constantine X Doukas and Eudokia Makrembolitissa. He was probably associated the throne late in 1059, together with or shortly before his newly born brother Konstantios Doukas. When Constantine X died on 23 May 1067, Michael VII was already 17 years old and should have been able to rule by himself. He exhibited little interest in politics, however, and his mother Eudokia and uncle John Doukas governed the empire as effective regents. On 1 January 1068, Eudokia married the general Romanos Diogenes, who now became senior co-emperor alongside Michael VII, Konstantios, and another brother, Andronikos. When Romanos IV was defeated and 
Title: Michael VII Doukas
Content:  Michael VII Doukas married Maria of Alania, daughter of King Bagrat IV of Georgia. By her he had at least one son, Constantine Doukas, co-emperor from c. 1075 to 1078 and from 1081 to 1087/8. He died c. 1095.
Title: Byzantine Empire under the Doukas dynasty
Content:   When Romanos IV was defeated and captured, Michael VII remained in the background, while the initiative was taken by his uncle John Doukas and his tutor Michael Psellos. They conspired to keep Romanos from regaining power after his release from captivity, while Michael felt no obligation to honor the agreement that Romanos struck with the Sultan. After the dispatch of Eudokia to a monastery, Michael VII was crowned again on October 24, 1071 as senior emperor. Although still advised by Michael Psellos and John Doukas, Michael VII became increasingly reliant on his finance minister Nikephoritzes. The emperor's chief interests, shaped by Psellos, were in academic pursuits, and he allowed Nikephoritzes to increase both taxation and luxury spending without properly financing the army. As an emperor 
Title: Michael VII Doukas
Content:  Michael VII Doukas, nicknamed Parapinakes (, lit. "minus a quarter", with reference to the devaluation of the Byzantine currency under his rule), was Byzantine emperor from 1071 to 1078.
Title: Andronikos Doukas (cousin of Michael VII)
Content:  Andronikos Doukas, Latinized as Andronicus Ducas, (Ανδρόνικος Δούκας; died 14 October 1077) was a Greek protovestiarios and protoproedros of the Byzantine Empire.
Title: Michael Doukas (protostrator)
Content:  Michael Doukas was born circa 1061, the eldest son of the domestikos ton scholon Andronikos Doukas, son of the Caesar John Doukas, and his wife, Maria of Bulgaria, the granddaughter of Tsar Ivan Vladislav of Bulgaria. Michael was thus the brother-in-law of Alexios I Komnenos, who had married his sister Irene Doukaina. In 1074, during the rebellion of the Norman mercenary Roussel de Bailleul, Michael and his younger brother John were at the estates of the Caesar John Doukas in Bithynia. Roussel demanded that the Caesar give up the two as hostages in return for releasing their wounded father, whom he held captive. The Caesar agreed, and the two were imprisoned by Roussel. The slave 
Title: Michael II Komnenos Doukas
Content:  Michael was an illegitimate son of Michael I Komnenos Doukas, the founder of the state of Epirus. The historian Demetrios Polemis estimates that he was born in the early years of his father's reign (1205–15), probably in ca. 1206. Like most members of his family, originally descended from the Angelos family, he preferred the surname "Doukas", or the variant "Komnenos Doukas" (Κομνηνός ὁ Δούκας), but is also referred to by contemporary Byzantine historians as "Angelos". After his father's murder in 1215 and the succession of his uncle Theodore Komnenos Doukas, he went into exile. According to the hagiography of his later wife, St. Theodora of Arta, 
Title: Michael I Komnenos Doukas
Content:  Michael was the illegitimate son of the sebastokrator John Doukas. His paternal grandparents were Constantine Angelos and Theodora, a daughter of Emperor Alexios I Komnenos ((r. 1081 – 1118)). Michael's uncle, Andronikos, was the father of the future emperors Isaac II Angelos ((r. 1185 – 1195)) and Alexios III Angelos ((r. 1195 – 1203)), who were thus Michael's first cousins. Despite this kinship, he never used the surname "Angelos", which has been applied by some modern scholars to Michael and his dynasty. The few documents surviving from his own hand and a couple of lead seals show his name as "Michael Doukas" 
Title: John I Doukas of Thessaly
Content:  John Doukas was an illegitimate (and apparently the eldest) son of Michael II Komnenos Doukas, the Despot of Epirus, possibly by his one known mistress, an unnamed lady of the Gangrenos family. His full family name was Doukas Komnenos Angelos, but he is almost universally referred to in the sources simply by the first surname of "Doukas". This also led to a confusion among his Latin contemporaries, who mistook it for his title, and referred to him as the "Duke of Neopatras". His actual title, which he received from the Byzantine emperor Michael VIII Palaiologos in c. 1272, was sebastokratōr. Nothing is known of his early life before 1259, when he is 
Title: Michael Doukas (protostrator)
Content:  Through his marriage to an unnamed woman, he had several children. Only one is attested with certainty, Constantine Doukas, a sebastos and governor of the region of the Vardar river circa 1118. Demetrios I. Polemis further identifies two Doukas women as two of Michael's daughters. The first is a certain Theodora Doukaina, attested in an epigram as married to a Theodore. Polemis considers her as the mother of Euphrosyne Doukaina, Michael's granddaughter, whose father was also named Theodore. The second is Irene Doukaina, the wife of Gregory Kamateros, a man of humble origin who rose to high office under Alexios Komnenos and his successor, John II Komnenos (r. 1118–1143). Another daughter, married to a certain John, is unnamed, and it is possible that a poem by Nicholas Kallikles refers to another son.

Question: Who is the father of Michael VII Doukas?
Answer: Konstantinos X Doukas.
Constantine X Ducas, Emperor of Constantinople.