Llywelyn ap Seisyll

Ruler of Gwynedd

Events

Date of Birth: about 965.

This estimated date is given by Bartrum (EVWG Early Series [41]).

Date of Death: 1023.

This date is given by Walker (ODNB). It is recorded in Brut y Tywysogion s.a. 1021 and in Annales Cambriæ s.a. 1023. It is also noted in some of the Irish annals.

Relationships

Father: Seisyll.

This relationship is given by Walker (ODNB) and by Bartrum (EVWG Early Series [41]). It is recorded in Brut y Tywysogion (Williams pp. 34-36) and in Annales Cambriæ s.a. 1023. Seisyll’s origins are unknown.

(possible) Mother: Prawst ferch Elise ab Anarawd.

This relationship is given (tentatively) by Walker (ODNB), who notes that it is given in later genealogies, and by Bartrum (EVWG Early Series [41]). There is some question as to whether she actually existed, or was a later invention.

Spouse: Angharad ferch Maredudd ab Owain.

This relationship is given by Walker (ODNB), by Maund (2000, p. 60), and by Bartrum (EVWG Early Series [41]). Maund (1991, p. 61) states that the link is found in a wide enough variety of sources to be reasonably credible.

Children:

Gruffudd (died 1063) married Ealdgyth, daughter of Aelfgar, Earl of Mercia.

References

Bartrum, Peter C (ed.) Early Welsh Genealogical Tracts. (Cardiff: University of Wales Press, 1968).

The sources Bartrum gives for Gruffudd include:

Jesus College MS. 20 -- (dated to the first part of the 14th century):

27. “...Y (Kynvin [Bledynt] hwnnw, a Gruffud vab Llewelyn, (a Thrahayarn m. Cradawc, tri) broder oedynt, meibon y Hagharat merch Maredud mab Ewein m. Howel da”

33.“...a Llewelyn m. Seissyll, tat Gruffud m. Llewelyn.”

Achau Brenhinoedd a Thywysogion Cymru (probably based on 15th century MSS):

7. (f) “Prawst ferch Elise ap Anarawd oedd fam Kynan ap Seissylt, a mam Llewelyn ap Seissyll, tad hen Ruffudd ap Llewelyn.”

(k) “Pllant Maredudd ap Ewein: Katwallawn ag Angharat mam Ruffudd ap Llewelyn ap Seissill, a mam Vleddyn ap Kynfyn, a mam Rriwallon ap Kynvyn ac Ewerydd.”

Brut y Tywysogion (21-23).

Bartrum, Peter C.,“Early Series [41]” in An Electronic Version of Welsh Genealogies AD 300-1500. [The source Bartrum gives for Llywelyn is own Early Welsh Genealogical Tracts]

Lloyd, John Edward, A History of Wales. 2 volumes (London: Longmans, Green and Co., 1911-1912).

Maund, K.L. Ireland, Wales, and England in the Eleventh Century (The Boydell Press, 1991).

Maund, Kari. The Welsh Kings (Tempus, 2000).

Walker, David “Gruffudd ap Llywelyn (d. 1063)” in The Oxford Dictionary of National Biography (Oxford University Press, 2004).

Williams ab Ithel, John (ed.). Annales Cambriæ (London: Longman, Green, Longman, and Roberts; 1860).

Williams ab Ithel, John (ed.). Brut y Tywysogion; or, The Chronicle of the Princes (London: Longman, Green, Longman, and Roberts; 1860).