Family
 Unknown 1)Notes: Stewart Baldwin explains that to ascribe Angharad as mother of Iwerydd is probably inaccurate: "Note: ByT, p. 101 explicitly states that Iwerydd ferch Cynfyn (#37) was Cynfyn's daughter by a mother (unnamed) different from Angharad. ABT.2f,7k states that Angharad was Iweydd's mother. Since it is a common mistake to assume that all of a man's children are by his known wife, it is more likely that ByT is correct here. For Angharad and her ancestors, see #49, #98, etc." Married/ Related to:  Cynfyn ap Gwerstan of Powys 1)Son of Gwerystan of Powys and Unknown. Born ± 990, 1st married/ related to: Unknown, 2nd married/ related to: Angharad ferch Maredudd of Dinefwr Child: | |||
Sources
1) Source: Llywelyn ap Iorwerth ancestor table . External Linkhttp://sites.rootsweb.com/~medieval/llywelyn.htm (Data from secondary evidence)