Title: William fitz Duncan
Content:  William fitz Duncan (a modern anglicisation of the Old French Guillaume fils de Duncan and the Middle Irish Uilleam mac Donnchada) was a Scottish prince, the son of King Duncan II of Scotland by his wife Ethelreda of Dunbar. He was a territorial magnate in northern Scotland and northern England and a military leader. In 1094, his father King Duncan II was killed by Mormaer Máel Petair of Mearns, supporting the claims of King Domnall (Donald) III Bán. It is probable that his mother Ethelreda took the infant William and fled Scotland to the safety of Allerdale in Cumberland where her brother Waltheof of 
Title: Fitzduncan
Content: William fitz Duncan (d. 1147), Scottish prince Fitzduncan is a Scottish Hiberno-Norman surname. It is patronymic as the prefix Fitz- derives from the Latin filius, meaning "son of". Its variants include the alternate forms FitzDuncan, fitz Duncan, and Fitz Duncan, and the given name turned surname Duncan. Fitzduncan is rare as a given name. People with the name Fitzduncan include: 
Title: Malcolm IV of Scotland
Content:  The Orkneyinga Saga claims "William the Noble", son of William fitz Duncan, was the man whom "every Scotsman wanted for his king". As William fitz Duncan married Alice de Rumilly c.1137, young William could only have been a youth, perhaps a child, by 1153. There is no evidence to suggest that William ever made any claims to the throne, and he died young, in the early 1160s, leaving his sizable estates to his three sisters. Of William Fitz Duncan's other sons, Bishop Wimund had already been blinded, emasculated and imprisoned at Byland Abbey before King David's death, but Domnall mac Uilleim, first of the Meic Uilleim, had considerable support in the Province of Moray. Another contender, imprisoned at Roxburgh since about 
Title: Duncan II of Scotland
Content:  Duncan's son by Ethelreda, William fitz Duncan, was a prominent figure during the reigns of Duncan's half-brothers Alexander and David. William seems to have served as an acknowledged heir to them for part of their reigns. His descendants the Meic Uilleim led various revolts against later Scottish kings. The last remaining Meic Uilleim, an infant daughter of Gille Escoib or one of his sons, was put to death in 1229 or 1230: "[T]he same Mac-William's daughter, who had not long left her mother's womb, innocent as she was, was put to death, in the burgh of Forfar, in view of the market place, after a proclamation by 
Title: William fitz Duncan
Content:  was lord. William, an only child, grew up there among his cousins. A decade or so later, he ventured to the court of his half-uncle. Under the reign of his half-uncle Alexander I, it is highly likely that William was regarded as a viable tánaiste (i.e. "designated heir"), but Henry I of England supported David. When David succeeded, William, as the legitimate king under the rules of primogeniture was certainly bought off by David, probably being made tánaiste. William repeatedly leads the lists of witnesses appearing in Scottish royal charters in the reigns of Alexander I and David I. A 13th century northern English 
Title: William fitz Duncan
Content:  le Gros, 1st Earl of Albemarle. He also had a large number of bastards, probably including Wimund of the Isles. It is now presumed that Domnall mac Uilleim, and the Meic Uilleim clan that repeatedly rebelled against later Scottish kings in their quest to gain the Scottish throne, were legitimate descendants of a marriage to a daughter of Óengus of Moray. This daughter was a granddaughter and heir general of King Lulach. Domnall mac Uilleim was killed on 31 July 1187 in an uprising against King William the Lion. William fitz Duncan died in 1147, whereupon Moray reverted back into the hands of David.
Title: Meic Uilleim
Content:  William fitz Duncan himself appears to have been the acknowledged successor of Kings Alexander I and David I for part of their reigns. When David's son, Henry reached adulthood in the 1130s, William was replaced as heir apparent by Henry. In return, he appears to have been compensated with the extensive lands of Óengus, Mormaer of Moray, grandson of king Lulach, who was killed in battle against David I's general Edward the Constable in 1130. On William's death in 1147, his extensive lands in the south passed to his son by Alice de Rumilly, William of Egremont, while Moray was retained by the king. Shortly after his death, William fitz Duncan's illegitimate son, Wimund, bishop of the Isles, attempted to gain his father's lands in 
Title: William fitz Duncan
Content:  frequently led Scottish armies. In the campaign of 1138, he led an army of Gaels that defeated a Norman English army at the Battle of Clitheroe, raising the hopes for the success of the royal army, hopes which failed to materialize at the Battle of the Standard. William had several marriages. His first marriage was over, presumably through death, by the year 1137, when he married Alice de Rumilly, daughter of William Meschin. By the latter, he had a son, also called William (William of Egremont or William the Atheling), who died in 1160, and three daughters, including Cicely, Lady of Skipton, who married 
Title: Duncan II of Scotland
Content:  Duncan married Ethelreda of Northumbria, daughter of Gospatric, Earl of Northumbria. The marriage is recorded in the Cronicon Cumbriæ. They had a single known son, William fitz Duncan.
Title: William Butler Duncan
Content:  William was born on May 1, 1862, in Providence, Rhode Island, the son of David Duncan (1835–1873) and Fannie (née Bloodgood) Duncan (1832–1874). After his parents' early deaths, young William was adopted by his paternal uncle, W. Butler Duncan I. His adoptive father (and uncle) was born in Edinburgh and became a banker in New York and chairman of the Mobile and Ohio Railroad. From 1858 to 1896, the Duncan family maintained a residence on Grymes Hill, Staten Island, in the former home of the neighborhood's namesake Suzette Grymes. William II graduated from the United States Naval Academy in 1882.

Question: Who is the father of William fitz Duncan?
Answer: Duncan II of Scotland.
Duncan II.
Duncun II.
Duncan II, King of Scotland.