Can we upload sources for this 3rd son of Ruaidhri? At the moment I can only find evidence for the following 2 sons:
Ruadrí mac Domnall, Mormaer of Moray Mormaer of Moray.
m ---. The name of Ruaidhri´s wife is not known.
Ruadhri & his wife had two children:
>1. Findláech mac Ruaidrí, thane of Angus, Mormaer of Moray MacRory (-[1018/20]). Thane of Angus, Mormaer of Moray. Orkneyinga Saga records that Sigurd Jarl of Orkney defeated “a Scottish earl called Finnleik”[478]. The Annals of Tigernach record that “Findlaech mac Ruaidhrí mormaer Moreb” was killed “a filiis fratris sui MaelBrighdi” in [1018/20][479]. The Annals of Ulster record the death in 1020 of "Finnlaech son of Ruadrí king of Alba…killed by his own people"[480].
>2. Máil Brigti mac Ruaidrí, Mormaer of Moray The Annals of Tigernach record that “Findlaech mac Ruaidhrí mormaer Moreb” was killed “a filiis fratris sui MaelBrighdi” in [1018/20][492].
[http://fmg.ac/Projects/MedLands/SCOTTISH%20NOBILITY.htm#_Toc268450047 (Cawley's Medlands)]
It would be interesting if we had validation for a 3rd son, too.