In 1175, Abergavenny Castle was the scene of a reputed massacre of local Welsh chieftains by the pious and ruthless William de Braose.

He firmly identifies Camelot with Winchester, an identification that remained popular over the centuries, though it was rejected by Malory's own editor, William Caxton, who preferred a Welsh location.

Based on this work, the first fuel cell was demonstrated by Welsh scientist and barrister Sir William Robert Grove in the February 1839 edition of the Philosophical Magazine and Journal of Science and later sketched, in 1842, in the same journal.

The most prominent names among Welsh hymn-writers are William Williams Pantycelyn and Ann Griffiths.

In its heyday, many celebrities belonged to the Golden Dawn, such as actress Florence Farr, Irish revolutionary Maud Gonne, Irish writer William Butler Yeats, Welsh author Arthur Machen, English author Evelyn Underhill, and English author Aleister Crowley.

* 1749 – William Jones, Welsh mathematician ( b. 1675 )

Welsh Jacobins include William Jones, a radical patriot who was a keen disciple of Voltaire.

A major royal expedition to enforce these agreements occurred in 1211, after Llywelyn attempted to exploit the instability caused by the removal of William de Braose, through the Welsh uprising of 1211.

Later 19th century historians such as William Forbes Skene brought new standards of accuracy to early Scottish history, while Celticists such as Whitley Stokes and Kuno Meyer cast a critical eye over Welsh and Irish sources.

In November 2005, he was invited to the Welsh Assembly as a guest speaker by Tory Welsh assembly member William Graham.

She is said to have been the daughter of a Welsh steel worker of Irish descent, William O ' Callaghan, who had been superintendent on the Indian State railways.

William also visited Wales during 1081, although the English and the Welsh sources differ on the exact purpose of the visit.

* January 11 – William Williams Pantycelyn, Welsh hymnist ( b. 1717 )

* January 23 – William Ifor Jones, Welsh conductor and organist ( d. 1988 )

* November 11 – William Ifor Jones, Welsh conductor & organist ( b. 1900 )

* November 20 – William Thomas ( Islwyn ), Welsh poet ( b. 1832 )

* September 10 – William Morgan, Welsh Bible translator ( b. 1545 )

* William Morgan's Welsh translation of the Bible is published.

* July 3 – William Jones, Welsh mathematician ( b. 1675 )

** William Williams Pantycelyn, one of the key leaders of the 18th century Welsh Methodist revival ( d. 1791 )

** William Morgan, Welsh Bible translator ( d. 1604 )

* The Massacre of Abergavenny ends with several Welsh noblemen dead at the orders of William de Braose.

Following the Norman conquest of England in 1066, the earldom of Hereford was given to William fitzOsbern of Breteuil, Normandy, one of King William's closest allies, who was responsible for defending the area against the Welsh.

The Welsh language version of the song The Ash Grove is putatively attributed to Ceiriog Hughes.

Born to English father Leslie Norman Clark and Welsh mother Doris ( née Phillips ), both nurses at Long Grove Hospital, in Epsom, Surrey, England, she was christened Petula Sally Olwen Clark.

Lucy Walter, a Welsh noblewoman, was the daughter of Richard or William Walter, of Roch Castle and of Haverfordwest and wife Elizabeth Protheroe, daughter of John Protheroe, of Hawkesbrook and wife Elinor Vaughan, maternal granddaughter of Walter Vaughan, of Grove and wife Mary or Katherine ferch Gruffud FitzUryan, in turn daughter of Griffith ap Rice FitzUryan ( d. 1592 ) and wife Eleanor Jones, daughter of Sir Thomas Jones, and paternal granddaughter of Rhys FitzUryan and wife Lady Katherine Howard ( c. 1518-12 April 1554, interred 11 May 1554 ), daughter of Thomas Howard, 2nd Duke of Norfolk and Agnes Tilney.

* The Ash Grove, a Welsh folk song.

The estate of Golden Grove lies near the town, and further away, the impressive Carreg Cennen castle, another Welsh stronghold.

Sir William Robert Grove PC QC FRS ( 11 July 1811 – 1 August 1896 ) was a Welsh judge and physical scientist.

* William Robert Grove ( 1811 – 1896 ), Welsh scientist

The music that plays on Pentagram < nowiki >'</ nowiki > s title screen is The Ash Grove, a Music of Wales | Welsh folk music | folk tune

The Welsh & English longbowman used a single-piece longbow ( but some bows later developed a composite design ) to deliver arrows that could penetrate contemporary plate armour and mail.

In the spring of 1976 Welsh skateboarders Jon Roberts and Pete Matthews developed a Plywood deck with foot bindings for use on the Dry Ski Slope at the school camp, Ogmore-by-Sea, Wales.

There was a similar decline in the steel industry, and the Welsh economy, like that of other developed societies, became increasingly based on the expanding service sector.

Very little historical information about Dark Age Welsh court tradition survives, but the Middle Welsh material came to be the nucleus of the Matter of Britain and Arthurian legend as they developed from the 13th century.

However, the Irish grian, ‘ sun ’ is thought to be derived from Proto-Celtic * greinā ‘ sun ’ and cognate with Welsh greian ‘ sun ’ and the Proto-Celtic * greinā is unlikely to have developed into Grannos in Gaulish and other Continental Celtic languages.

While some details may hark back to older Iron Age traditions, each of these tales is the product of a highly developed medieval Welsh narrative tradition, both oral and written.

The town originally was developed by Welsh miners who were Protestants, usually members of the Methodist Church.

An element * ambri-' channel, river ' is reconstructible for proto-Celtic and the Ancient Celtic prefix * su-' good ' routinely developed into Welsh * hy -.

Since the two Corgi breeds developed in the Welsh hill country, in areas only a few miles apart, there is evidence of crossbreeding between the two that accounts for the similarities.

A continuous coastal path is being developed along the entire Welsh shore under the auspices of the Countryside Council for Wales.

The tradition of grammars of the Welsh Language developed from these through the Middle Ages and to the Renaissance.

Caldicot is the nearest town to the Welsh side opening of the Severn railway tunnel, although the nearest station serving the line through the tunnel, Severn Tunnel Junction, is at Rogiet, a village which was developed in modern times largely to service the railway.

The Welsh hat may have developed from a number of types of tall hat including the riding hat, which ladies wore during the early part of the 19th century, ( as illustrated in the Llanover prints ) but no evidence has been discovered which explains why, during the late 1830s, the tall hat with the stiff, flat brim, ( which is unique to the Welsh hat ), replaced the other types of men ’ s hat worn by many rural women in Wales at the time.

It was not until American troops eventually started to break out from the Normandy lodgement, as Operation Cobra developed momentum, in August 1944, that the Germans withdrew from Hill 112 and the 53rd Welsh Division occupied the feature, with barely a fight.

The club developed a home of its own in 1931 at The Avenue in Sunbury, the first game was played on 5 December against London Welsh ; the result was an honourable 8 – 8 draw.

It was while working in Wales that he developed a love and respect for the Welsh people that endured all his life.

Unlike similarly derived names in England, which generally lost their penultimate syllable and became Preston, this village's name developed a typically Welsh emphasis on the penultimate syllable and a modification of " ton " to " tyn ", as also happened at Mostyn.

Welsh Terriers were developed to hunt independently and this required that they be very assertive and stoic dogs.

With this she developed a deep concern to preserve the countryside and wildlife of the Welsh Marches.

Radyr developed after the Norman invasion of Wales at the start of the 12th century and formed part of the Welsh Lordship or cantref of Miskin under the Lordship of Glamorgan created by the Norman King, William Rufus, in 1093.

The strength of Welsh rugby developed over the following years, which could be attributed to the ' big four ' South Wales clubs of Newport ( who lost only seven games under the captaincy of Llewellyn Lloyd between the 1900 / 01 and 1902 / 03 seasons ), Cardiff, Llanelli ( who lost just twice in 1894 and 1895 ) and Swansea.

His interest in Welsh developed from a desire to spread the Christian gospel and especially to combat the influence of atheism, Roman Catholicism, and Mormonism in Wales.