In 1412, Owain led one of the final successful raiding parties with his most faithful soldiers and cut through the King ’ s men, and consequently captured, and later ransomed, a leading Welsh supporter of King Henry's, Dafydd Gam (" Crooked David "), in an ambush in Brecon.

** Dafydd Gam, Welsh nobleman ( b. c. 1380 )

According to local tradition, Dafydd Gam, a Welsh ally of the English Kings, was imprisoned here from 1404 to 1412 for attempting to assassinate Owain Glyndŵr.

His line of descent was from Dafydd Gam.

* Dafydd Gam, a Welsh medieval nobleman

Sir Dafydd ap Llewelyn ap Hywel ( c. 1380 – October 25, 1415 ), better known as Dafydd Gam or Davy Gam, was a Welsh medieval nobleman, a prominent opponent of Owain Glyndŵr, and who died at the Battle of Agincourt fighting for King Henry V, King of England in that victory against the French.

Dafydd Gam was a member of one of the most prominent Welsh families in Breconshire.

His recent pedigree was ' Dafydd Gam ap Llywelyn ap Hywel Fychan ap Hywel ap Einion Sais ', but beyond that the family claimed an ancient Welsh lineage going back to the Kings of Brycheiniog.

Dafydd Gam was certainly being paid the substantial annuity of 40 marks by Henry ’ s estate in 1399, even before Bolingbroke became King, and later he and his brothers were described as King ’ s esquires.

In 1412 Dafydd Gam was captured by Glyndŵr ’ s men and estimates of the amount paid as his ransom recorded at the time, range from 200 to 700 marks, a large amount.

Records show that Dafydd Gam served with three foot archers in the Battle of Agincourt campaign.

Then a group of Welsh knights in the King ’ s bodyguard led by Dafydd Gam intervened to save Henry's life, only for some to be killed in doing so, including Dafydd himself, and his son in law Sir Roger Vaughan.

His beautiful daughter Gwladys ferch Dafydd Gam, Seren y Fenni (), made two good marriages, the first to Sir Roger Vaughan, who also died at Agincourt.

The stories certainly testify to Dafydd Gam ’ s position as typifying the loyal and valiant Welshman by the Tudor period.

He may have made an even larger contribution to the play for as the Oxford Dictionary of National Biography states Dafydd: “ may indeed, as has been suggested, be the model for Shakespeare's Fluellen, the archetypal Welshman .” This theory making Dafydd Gam one of the sources for the play has long been discussed, as early as 1812 it was said “ There can be little doubt but that Shakspeare, in his burlesque character of Fluellen, intended David Gam .”

Dafydd Gam is commemorated in a stained glass window, of unknown date, at Llantilio Crossenny church, in the north wall.

cs: Dafydd Gam

His grandson Llywelyn the Great is not known to have used the title ' Prince of Wales ' as such, although his use, from around 1230, of the style ' Prince of Aberffraw, Lord of Snowdon ' was tantamount to a proclamation of authority over most of Wales, and he did use the title ' Prince of North Wales ' as did his predecessor Dafydd ab Owain Gwynedd.

In 1240, the title was theoretically inherited by his son Dafydd ap Llywelyn, though he is not known to have used it.

In 1282, Llywelyn was killed during Edward I of England's invasion of Wales, possibly by Sir Anthony de Tipton, who was knighted by the King of England afterward, and although his brother Dafydd ap Gruffudd succeeded to the Welsh princeship, issuing documents as prince, his principate was not recognised by the English Crown.

The war started with a rebellion by Dafydd, who was discontented with the reward he had received from Edward in 1277.

The conquest of Gwynedd was complete with the capture in June 1283 of Dafydd, who was taken to Shrewsbury and executed as a traitor the following autumn.

War broke out in 1241 and then again in 1245, and the issue was still in the balance when Dafydd died suddenly at Abergwyngregyn, without leaving an heir in early 1246.

He maintained his position in Wales until his death in 1240 and was succeeded by his son Dafydd ap Llywelyn.

In his account of his journey around Wales in 1188 Giraldus Cambrensis mentions that the young Llywelyn was already in arms against his uncles Dafydd and Rhodri ;

Following his capture, William de Braose decided to ally himself to Llywelyn, and a marriage was arranged between his daughter Isabella and Llywelyn's heir, Dafydd ap Llywelyn.

Dafydd succeeded Llywelyn as prince of Gwynedd, but King Henry was not prepared to allow him to inherit his father's position in the remainder of Wales.

Dafydd was forced to agree to a treaty greatly restricting his power and was also obliged to hand his half-brother Gruffydd over to the king, who now had the option of using him against Dafydd.

This left the field clear for Dafydd, but Dafydd himself died without issue in 1246 and was eventually succeeded by his nephew, Gruffydd's son, Llywelyn the Last.

Dafydd Glyn Jones wrote of the fire that it was " the first time in five centuries that Wales struck back at England with a measure of violence ... To the Welsh people, who had long ceased to believe that they had it in them, it was a profound shock.

Owain was married twice, first to Gwladus ferch Llywarch ap Trahaearn, by whom he had two sons, Maelgwn ab Owain Gwynedd and Iorwerth Drwyndwn, the father of Llywelyn the Great, then to Cristin, by whom he had three sons including Dafydd ab Owain Gwynedd and Rhodri ab Owain Gwynedd.

Owain then designated Hywel ab Owain Gwynedd as his successor, but after his death Hywel was first driven to seek refuge in Ireland by Cristina's sons, Dafydd and Rhodri, then killed at the battle of Pentraeth when he returned with an Irish army.

Dafydd and Rhodri split Gwynedd between them, but a generation passed before Gwynedd was restored to its former glory under Owain's grandson Llywelyn the Great.

Richard Dafydd Vivian Llewellyn Lloyd ( 8 December 1906 – 30 November 1983 ), better known by his pen name Richard Llewellyn, was a British novelist.

In the 13th century, Llywelyn Fawr, his son Dafydd ap Llywelyn and grandson Llywelyn ap Gruffudd had Abergwyngregyn on the north coast as their home.

His father was supposed to be Siôn ap Dafydd ap Madog ap Hywel Moetheu of Porth-y-ffin, also near Tregaron.

The sound of the crwth was described by medieval poet Gruffydd ap Dafydd ap Hywel as ' in the hand a hundred voices ' ( yn y llaw yn gan llais '), referring to the rich sound of six strings sounded simultaneously in harmony.

Naturally, once he'd enjoyed some of the benefits of power, Dafydd felt disinclined to share, as well as no doubt nervous that he might also soon share the fate of his predecessor Hywel ; in 1173 he acted against his brother Maelgwn and drove him into exile in Ireland thereby gaining possession of all Anglesey for himself.

Dafydd continued the fight and kept the support of Goronowy ap Heilin, the Lord of Rhôs, as well as Hywel ap Rhys Gryg and his brother Rhys Wyndod, disinherited princes of Deheubarth.

At his death in 1170, a bloody dispute broke out between his heir Hywel the Poet-Prince and Owain's younger sons Maelgwn, Rhodri, and led by Dafydd, all three the sons of the Princess-Dowager Cristen.

* Jenkins, Dafydd ( 2000 ), Hywel Dda: the law.

* Dafydd Ap Hywel

Finnish magician, of a moderate rank ( identified as ' B +') slightly higher than that of Jim, who appears among those observing Carolinus answer the challenge posed by Son Won Phon, and who prevents the injured Sir Brian and Dafydd ap Hywel from hemorrhage.

Together, Dafydd and Rhodri attacked and killed their brother Hywel ab Owain Gwynedd that same year.

Siôn Eos was hanged, and Dafydd ab Edmwnd laments that he could not have been tried under the more humane Law of Hywel rather than " the law of London ".

* Dafydd Jenkins ( 1986 ) The law of Hywel Dda: law texts from mediaeval Wales translated and edited ( Gomer Press ) ISBN 0-86383-277-6

Dafydd Gam's father, Llywelyn ap Hywel, purchased the estate of Penywaun near Brecon and Dafydd is thought to have been born there.

* Hywel ap Dafydd

The dowager princess plotted to have her eldest son Dafydd usurp the Throne of Gwynedd from Hywel, and with Gwynedd divided between Dafydd and her other sons Rhodri and Cynan.

Dafydd himself landed his army on the island and caught Hywel off guard at Pentraeth, defeating his army and killing Hywel.