Finnghuala ingen Sinill of Angus - Death date wrong?

If this is indeed the wife of Lulach and mother of Mael Snechtai, a death date of 1058 (with Lulach?) is not possible because The Anglo-Saxon Chronicle, s.a. 1078, reports that "In this year Máel Coluim seized the mother of Máel Snechtai ...and all his treasures, and his cattle; and he himself escaped [only] with difficulty."

As to her status as Lulach's wife:
Shakespeare has Macbeth say “By Sinel’s death I know I am thane of Glamis” - which could be alluding to a connection through his stepson’s wife (Finghualla of Angus daughter of Sinhill) - seems a bit of a stretch and Shakes uses Holinshed as his source - who is often out. Eg Glamis, if I recall, didn't exist in Macbeth's time.

Still, we know that Lulach's grandson was called Angus:

>>Mormaer Gillacomgain & his [wife] had [one child]: [http://fmg.ac/Projects/MedLands/SCOTTISH%20NOBILITY.htm#_Toc268450047 (Cawley's Medlands)]

>>>i) [Lulach mac Gille Coemgáin, King of Scots LULACH] ([1032]-killed in battle Essie, Strathbogie 17 Mar 1058, bur Isle of Iona). As noted above, the primary sources are unclear concerning the parentage of Lulach. He succeeded [his stepfather] in 1057 as LULACH "the Simple" King of Scotland, crowned Aug 1057 at Scone Abbey, Perthshire. The Annals of Ulster record that "Lulach son of Gilla Comgain, over-king of Scotland was killed in battle by [Malcolm III, 'Canmore', King of Scots Mael Coluim] son of [Duncan I, King of Scots Donnchad]" in 1058[501].][http://fmg.ac/Projects/MedLands/SCOTTISH%20NOBILITY.htm#_Toc268450047 (Cawley's Medlands)]

>>>m ---. [Finnghuala Macsinhill daughter of Sinhill, Mormaer of Angus Finnghuala of Angus?] The name of Lulach´s wife is not known.

>>>Lulach & his wife had two children: [http://fmg.ac/Projects/MedLands/SCOTTISH%20NOBILITY.htm#_Toc268450047 (Cawley's Medlands)]

>>>>(a) [Máel Snechtai mac Lulaich, King of Moray MAELSNECHTAI] (-1085). A grant by "Maelsnecte son of Luloeg" to the church of Deer is recalled in a notice of grants between 565 and 1100[502]. Mormaer of Moray until 1078. Monk. [http://fmg.ac/Projects/MedLands/SCOTTISH%20NOBILITY.htm#_Toc268450047 (Cawley's Medlands)]

>>>>(b) [Tul / Olith, of Moray daughter]. Her parentage is confirmed by the Annals of Ulster which record the death in 1130 of "Angus son of the daughter of Lulach” in a battle “between the men of Scotland and the men of Moray”[503]. The name of her husband is not known.

>>>>m ---. One child: [http://fmg.ac/Projects/MedLands/SCOTTISH%20NOBILITY.htm#_Toc268450047 (Cawley's Medlands)]

>>>>>(1) [Angus, Mórmaer of Moray ANGUS] (-killed in battle Strickathrow 1130). Mormaer of Moray. Moray was conquered by the Scots in 1130 after Mormaer Angus's defeat at Strickathrow[504]. The Annals of Ulster record the death in 1130 of "Angus son of the daughter of Lulach” in a battle “between the men of Scotland and the men of Moray”[505]. John of Fordun´s Scotichronicon (Continuator) records that "Malcolmus filius Macheth" lied to claim he was "filium Angusii comitis Moraviæ" who was killed "tempore…regis David…apud Strucathroth a Scotis"[506]. [http://fmg.ac/Projects/MedLands/SCOTTISH%20NOBILITY.htm#_Toc268450047 (Cawley's Medlands)]