Donnchad belonged to the lineage of Síl nOnchon.
Events
Date of Birth: unknown.
Place of Birth: unknown.
Date of Death: 1006.
Place of Death: unknown.
The date is given by Mac Shamhráin. Donnchad was slain by his kinsmen.
Relationships
Father: Diarmait, son of Domnall.
This relationship is given by Mac Shamhráin, by Jaski (p. 122), and by Byrne (p. 290). Baldwin gives the paternal ancestry as Diarmait (died 996), son of Domnall (died 974), son of Cellach (died 947), son of Cinaed mac Cairpre (died 935).
Mother: unknown.
Spouse: Mael Maidne ingen Domnaill.
This relationship is given by Baldwin
Spouse: Aife, daughter of Gilla Pátraic, king of Osraige.
This relationship is given by Mac Shamhráin.
Children (by Mael Maidne):
Domnall Remur (died 1041) married a Mac Faelain.
Children (by Aife):
Domnall Remur.
Diarmait married Derbforgaill, daughter of Donnchad.
Evidence
from the Ban Senchus (Dobbs ed, Revue Celtique XLVIII (1931) p. 192:
Mael Maidne ingen Domnaill (ob. 995) m. Fhelain ri na nDesi Muman, mathair Domnaill Remair (ob. 1041) ri Laigen.
References
Baldwin, Stewart. “Eve of Leinster and Radnaillt of Dublin”, a posting (26 February 1998) to soc.genealogy.medieval.
Byrne, Francis J. Irish Kings and High-Kings 2nd ed. (Dublin: Four Courts, 2001).
Dobbs, Margaret. “The Ban-Shenchus” in Revue Celtique (1930, pp. 283-339; 1931, pp. 163-234; 1932, pp. 437-489).
Jaski, Bart. “The traditional rule of succession in early Ireland” (Ph.D. thesis, Trinity College Dublin, 1994). Appendix 2, Genealogical tables of medieval Irish royal dynasties. Online PDF:
https://www.academia.edu/4144299/Genealogical_tables_of_medieval_Irish_royal_dynasties
Mac Shamhráin, Ailbhe.“Donnchad Máel na mBó” in the Dictionary of Irish Biography (Cambridge University Press, 2009).