The Royal House is deemed to be a historiographical and genealogical term historians use to illustrate the line of succession from Rhodri the Great of Wales through his eldest son Anarawd from the 870s AD.

[12] According to Hubert Lewis, though not explicitly codified as such, the edling, or heir apparent, was by convention, custom, and practice the eldest son of the lord or Prince and was entitled to inherit the position and title as "head of the family" from the father.

[12] Men could also claim royal title through the maternal patrimony of their mother's line in certain circumstances (which occurred several times during the period of Welsh independence).

[13] The female line of the dynasty was also considered to remain royal, as marriage was an important means of strengthening individual claims to the various kingdoms of Wales and uniting various royal families to that of Aberffraw, or reuniting factions after dynastic civil wars (for example with the marriage of Hywel Dda, a member of the Dinefwr branch of the Aberffraw dynasty, and Elen of Dyfed, daughter of Llywarch ap Hyfaidd, King of Dyfed).

[citation needed] During the Cambro-Norse era (850s – 1100s), Wales was subjected to Viking raids all throughout the country between 852 and 919 (the Jómsvíkinga saga refers to that period).

This led to the construction of Offa's Dyke, a territorial land border between England and Wales built in the mid to late 8th century.

However, war broke out against the English for decades from 853, this culminated in a victory for the Welsh Kingdoms of Gwynedd and Powys against Mercia and Wessex and their Viking allies.

[12] Owain Gwynedd, Gruffudd's son defeated King Henry II of England and the vast Angevin host in the 1157 campaign and again in 1166.

The proclamation reasserted and updated the Aberffraw claims to be the principal royal house of Wales, as senior line descendants of Rhodri the Great.

[34] Below is an example of a couple of 'Llysoedd': Nearby Aberffraw at Newborough, Anglesey was Llys Rhosyr, where pottery and coins were excavated in the area dating between the years 1247 – 1314.

Llywelyn, as Prince, re-edified the rules of the 'royal suite', which were reenacted from the original laws and customs from the year 914 for the Aberffraw Royal Palace.

As Llywelyn II was a second son and direct (lineal) descendant of Rhodri Mawr and Owain Gwynedd, his succession caused number of problems within the House of Aberffraw.

The 13th century Llywelyns, rulers of Wales controlled their neighbouring Kingdoms through a political framework whilst excluding and subduing the descendants of Norman marcher lords through warfare.

King John I of England (Llywelyn's father-in-law) intervened in Powys returning the Kingdom to Prince Gwenwynwyn in 1209, however, the intervention caused a retaliation in the form of the Welsh uprising of 1211.

Llywelyn would gain favour from Pope Innocent III who excommunicated King John and encouraged the Welsh Principality to rebel against English rule.

King Edward I forced the remaining members of the family to surrender their claim to the title of Prince of Wales under the Statute of Rhuddlan in 1284, which also abolished the independent Welsh peerage.

Other members of the family did lay claim to their heritage; they included Owain Lawgoch as the lineal successor to Llywelyn II in the 14th century.

[46] Merely a century after the end of the dynasty, it was the Meyrick (Welsh: Meurig) family of nearby Bodorgan who were given the Crown lease for the manor lands of the Aberffraw cantref.

Then Heilyn's son Meurig ap Llewelyn became captain of the bodyguard to Henry VIII, and the same family was once again rewarded with an extension of the land's lease.