The primary sources concerning the life and "reign" of Giric include chronicle entries dating to the years 1251 and 1317. They can be found in
The Chronicles of the Picts and Scots of
William Forbes Skene. The chronicle of
John of Fordun (14th century) mentions Giric as "Grim" or "Gryme", reporting him killed by King
Malcolm II. Giric is not mentioned by earlier sources, which would make his existence questionable.
John Bannerman theorised that
mac Duib, the Gaelic patronymic of Kenneth III, evolved to the surnames
Duff and
MacDuff, and that Kenneth III could be a direct ancestor to
Clan MacDuff, which produced all
mormaers and
earls of Fife from the 11th to the mid-14th century, noting that Giric could be the actual founder of the house, following a pattern of several Scottish clans seemingly founded by grandsons of their eponym. The only event reported in Kenneth's reign is the killing of Dúngal mac Cináeda by Gille Coemgáin mac Cináeda, by the
Annals of the Four Masters s.a. 999. It is not certain that this refers to events in Scotland, and whether one or both were sons of this Kenneth, or of King
Kenneth II or some other person or persons, is not known. A "Gilla Caemgein son of Cinaed" also appears in the
Annals of Ulster. An entry from the year 1035 reports that his unnamed granddaughter and her husband Cathal, son of Amalgaid, were both killed by Cellach, son of Dúnchad. This Cathal was reportedly King to the Western
Laigin, possibly connected to the
Kings of Leinster. The context is unclear but it is likely that this is the same Gille Coemgáin, connected to Kenneth III. Kenneth III was killed in battle at
Monzievaird in
Strathearn by King
Malcolm II (Máel Coluim mac Cináeda), which took place about 25 March 1005. Whether
Boite mac Cináeda was a son of this Kenneth, or of Kenneth II, is uncertain, although most propose this Kenneth. A son, or grandson of Boite, was reported to be killed by Malcolm II in 1032 in the Annals of Ulster. The relevant entry has been translated as:
"The grandson of Baete son of Cinaed was killed by Mael Coluim son of Cinaed". Boite's daughter,
Gruoch (Gruoch ingen Boite meic Cináeda) –
William Shakespeare's
Lady Macbeth – was wife firstly of
Gille Coemgáin,
mormaer of Moray, and secondly of King
Macbeth; her son by Gille Coemgáin,
Lulach (Lulach mac Gille Coemgáin), succeeded Macbeth as King of Scotland. The
meic Uilleim, descendants of
William fitz Duncan by his first marriage, were probably descended from Kenneth; and the
Clann Mac Aoidh or Clan Mackay claim descent from Kenneth III through Lulach's daughter. The theory that Clan MacDuff were descendants of Kenneth III was based on their close connection to royalty.
Andrew of Wyntoun reported that
Malcolm III (reigned 1058–1093) had granted to a "MacDuff,
thane of Fife" the privilege of enthroning the kings at their inauguration. John of Fordun has Malcolm III promise this same unnamed MacDuff that he will be the first man of the kingdom, second only to the King. This unnamed MacDuff appears frequently in stories connected to the rise of Malcolm III to the throne and was later immortalised in the Shakespearean character
Macduff. The status of the successive heads of this clan as the "
senior inaugural official" seems confirmed by records of the inauguration ceremonies of
Alexander II (reigned 1214–1249) and
Alexander III (reigned 1249–1286). Earlier heads of this house "
witnessed royal documents far more frequently" than other members of the nobility; their names were often listed first among the lay witnesses, ahead of both the native
Scottish nobility and the
Anglo-Norman nobles. A number of 12th century heads of house served as
justiciars of Scotia. Their leaders were named
Donnchadh (
Duncan), Mael-Coluim (
Malcolm), and Causantin (
Constantine), names shared by the royal family, making a close relation to the reigning royal house likely. Bannerman suggests that the MacDuffs had their own, legitimate claim to the Scottish throne, which they declined to pursue, having been compensated with privileges by Malcolm III and his descendants. == Interpretation ==