In or before 1100 [his father] King Gruffudd ap Cynan of Gwynedd (age 44) and [his mother] Angharad Queen Consort Gwynedd (age 34) were married. He the son of [his grandfather] Cynan ab Iago King Gwynedd and [his grandmother] Ragnaillt Unknown Queen Consort Gwynedd. They were second cousin once removed.

Around 1100 Owain "Great" King Gwynedd was born to King Gruffudd ap Cynan of Gwynedd (age 45) and Angharad Queen Consort Gwynedd (age 35).

Around 1120 [his illegitimate son] Hywel ab Owain King Gwynedd was born illegitimately to Owain "Great" King Gwynedd (age 20) and Ffynnod Wyddeles Unknown.

Before 1130 Owain "Great" King Gwynedd (age 29) and Gwladus Unknown Queen Consort Gwynedd (age 14) were married. She by marriage Queen Consort Gwynedd. He the son of King Gruffudd ap Cynan of Gwynedd (age 74) and Angharad Queen Consort Gwynedd (age 64).

In 1130 [his son] Iorwerth "Drwyndwn aka Flat Nosed" Aberffraw was born to Owain "Great" King Gwynedd (age 30) and [his wife] Gwladus Unknown Queen Consort Gwynedd (age 15).

In 1137 [his father] King Gruffudd ap Cynan of Gwynedd (age 82) died. His son Owain "Great" King Gwynedd (age 37) succeeded King Gwynedd.

Around 1145 [his son] Dafydd ab Owain Aberffraw Prince Gwynedd was born to Owain "Great" King Gwynedd (age 45) and [his wife] Cristin ferch Goronwy Unknown Queen Consort Gwynedd (age 40). Coefficient of inbreeding 3.22%.

Around 1145 Owain "Great" King Gwynedd (age 45) and Cristin ferch Goronwy Unknown Queen Consort Gwynedd (age 40) were married. She by marriage Queen Consort Gwynedd. He the son of King Gruffudd ap Cynan of Gwynedd and Angharad Queen Consort Gwynedd (age 80). They were first cousins.

Around 1147 [his son] Rhodri Aberffraw was born to Owain "Great" King Gwynedd (age 47) and [his wife] Cristin ferch Goronwy Unknown Queen Consort Gwynedd (age 42). Coefficient of inbreeding 3.22%.

In 1155 [his wife] Gwladus Unknown Queen Consort Gwynedd (age 40) died.

In 1162 [his mother] Angharad Queen Consort Gwynedd (age 97) died.

On 28 Nov 1170 Owain "Great" King Gwynedd (age 70) died. His son [his illegitimate son] Hywel ab Owain King Gwynedd succeeded King Gwynedd.

In 1175 [his former wife] Cristin ferch Goronwy Unknown Queen Consort Gwynedd (age 70) died.

[his illegitimate son] Cynan ab Owain Gwynedd Lord of Merioneth was born illegitimately to Owain "Great" King Gwynedd.

[his illegitimate son] Iago Aberffraw was born illegitimately to Owain "Great" King Gwynedd.

[his daughter] Margaret Aberffraw was born to Owain "Great" King Gwynedd.

[his illegitimate son] Ffilip Aberffraw was born illegitimately to Owain "Great" King Gwynedd.

[his daughter] Angharad Aberffraw was born to Owain "Great" King Gwynedd.

[his illegitimate son] Cadell Aberffraw was born illegitimately to Owain "Great" King Gwynedd.

[his illegitimate son] Madoc Aberffraw was born illegitimately to Owain "Great" King Gwynedd.

[his illegitimate son] Rotpert Aberffraw was born illegitimately to Owain "Great" King Gwynedd.

[his illegitimate daughter] Gwenllian Aberffraw was born illegitimately to Owain "Great" King Gwynedd.

[his illegitimate son] Idwal Aberffraw was born illegitimately to Owain "Great" King Gwynedd.

[his illegitimate son] Cynwrig Aberffraw was born illegitimately to Owain "Great" King Gwynedd.

[his illegitimate son] Einion Aberffraw was born illegitimately to Owain "Great" King Gwynedd.

[his illegitimate son] Rhirid Aberffraw was born illegitimately to Owain "Great" King Gwynedd.

[his daughter] Gwenllian Aberffraw was born to Owain "Great" King Gwynedd.

[his son] Maelgwn ab Owain Aberffraw was born to Owain "Great" King Gwynedd and Gwladus Unknown Queen Consort Gwynedd.

[his illegitimate son] Rhun ab Owain Aberffraw was born illegitimately to Owain "Great" King Gwynedd and Ffynnod Wyddeles Unknown.

[his son] Iefan Aberffraw was born to Owain "Great" King Gwynedd.