Gronwy was of Cyfeiliog.
Events
Date of Birth: unknown.
Place of Birth: unknown.
Bartrum gives Gronwy a number of 6 in his generational dating system, which implies a birth date of, very roughly, about 1200. But Gronwy was witness to a number of charters in the 1180s and 1190s.
Date of Death: unknown.
Place of Death: unknown.
Relationships
Father: Einion ap Seisyll.
This relationship is shown by Bartrum (Seisyll 1) and by Stephenson, who notes that Gronwy appears as a witness to a 1191 charter as "Gorgonius filius Einiaun Kenewal", the "Kenewal" probably indicating that Einion ap Seisyll was from Cynfael. The charter is no. 544 in Pryce, dated 22 February 1191.
Mother: Nest ferch Madog.
This relationship is shown by Bartrum (Seisyll 1).
Spouse: Meddefus ferch Owain Cyfeiliog.
This relationship is shown by Bartrum (Seisyll 1).
Spouse: Nest ferch Cynfelyn ap Dolffyn.
This relationship is shown by Bartrum (Seisyll 1).
Children (by Meddefus):
(Complete source citations for facts about the children on this page are currently outside of the scope of this project. Most information below comes from Bartrum.)
Tudur (living 1271, 1278).
Gwȇn married Arddun ferch Ifor; also married a daughter of Owain.
Iorwerth married Morfudd ferch Madog ap Gruffudd Gȏch.
Children (by Nest):
Dyddgu married Rhirid Goch ap Meurig Sais ap Griffri ap Gronwy.
Children (mother unknown):
Jonet married Maredudd ab Einion.
Jonet married Maredudd Goch.
Madog.
Elen married Llywelyn ap Tudur.
References
Bartrum, Peter C., “Seisyll 1” in An Electronic Version of Welsh Genealogies AD 300-1500.
[The sources that Bartrum cites for Gronwy are: Peniarth 131 (281), written by Ieuan Brechfa about 1500; Peniarth 129 (50, 94), copied about 1500 from a 1497 MS by Gutun Owain; and Peniarth 127 (34, 145), written by Syr Thomas ap Ieuan ap Deicws between about 1510 and 1523.]
Pryce, Huw. The Acts of the Welsh Rulers. (University of Wales Press, 2005).
Stephenson, David. Medieval Powys: Kingdom, Principality and Lordships, 1132-1293. (The Boydell Press, 2016).