Question: William Devereux, Baron Devereux of Lyonshall held Lyonshall Castle controlling a strategically vital approach to the border of Wales in the time of?

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John Devereux, 1st Baron Devereux: John Devereux, 1st Baron Devereux, KG, was a close companion of Edward, the Black Prince, and an English peer during the reign of King Richard II.

William Devereux (died 1376/7): William Devereux of Bodenham was a prominent knight in Herefordshire during the reign of Edward III, and an important member of the retinue of the Earls of Hereford.  He is the ancestor of the Devereux Earls of Essex and Viscounts of Hereford.

Kilmore, County Wexford: Kilmore or Killmore (Irish: "an Chill Mhór" , meaning "the big church"), locally pronounced 'Kilmoor', is a village and townland in south County Wexford, Ireland, about 16 km from Wexford town.  Kilmore has a number of claims to distinction, including the tradition of carol singing in the village church at Christmas time, which has been taking place for over 200 years.  The history of the Kilmore carols can be traced from the mid 18th century to the present day.  They have been sung without a break since they were introduced to the parish by Very Rev. Peter Devereux, who was Parish Priest circa 1751.  Some of them were written by Very Rev. William Devereux, P.P., Piercestown, a native of The Ring, Tacumshane, where he is buried.  The remainder were written by Bishop Luke Waddinge of Ferns.

Edward I of England: Edward I (17/18 June 1239 – 7 July 1307), also known as Edward Longshanks and the Hammer of the Scots (Latin: "Malleus Scotorum" ), was King of England from 1272 to 1307.  He spent much of his reign reforming royal administration and common law.  Through an extensive legal inquiry, Edward investigated the tenure of various feudal liberties, while the law was reformed through a series of statutes regulating criminal and property law.  Increasingly, however, Edward's attention was drawn towards military affairs.

Walter Devereux (born 1173): Walter Devereux was an Anglo-Norman nobleman living during the reign of king Henry II of England and Richard I of England.  The Devereux, along with the Baskervilles and Pichards, were prominent knightly families along the Welsh marches during the twelfth century, and linked to William Marshal, 1st Earl of Pembroke, and the Braose and Lacy lordships of the region.  William Devereux's descendants would later give rise to the Devereux Viscounts of Hereford and Earls of Essex.

William Devereux: William Devereux was an Anglo-Norman nobleman living during the reigns of kings William I, William II, and Henry I of England.  The Devereux, along with the Baskervilles and Pichards, were prominent knightly families along the Welsh marches at the beginning of the twelfth century, and linked to the Braose and Lacy lordships of the region.  William Devereux's descendants would later give rise to the Devereux family of Hereford, and the Devereux Viscounts of Hereford and Earls of Essex.

William Devereux, Baron Devereux of Lyonshall: William Devereux, Baron Devereux of Lyonshall, was an important Marcher Lord, and held Lyonshall Castle controlling a strategically vital approach to the border of Wales in the time of Edward I and Edward II.  He was the first of this family officially called to Parliament, and was ancestor to John Devereux, 1st Baron Devereux of Whitchurch Maund, the Devereux Earls of Essex, and the Devereux Viscounts of Hereford.  His coat of arms was the same as his father's and described as "argent, fess and three roundels in chief gules" which passed to the descendants of his first wife, the Devereux of Bodenham; or "gules od un fesse d'argent ove turteaus d'argent en le chief" which passed to the descendants of his second wife, the Devereux of Frome.

William Devereux (1219 to 1265): William Devereux (1219 to 1265), was an important Marcher Lord, and held Lyonshall Castle controlling a strategically vital approach to the border of Wales.  The castle’s significance was heightened by the rebellion of Llywelyn ap Gruffudd, Prince of Wales.  With strong family ties to the politically powerful families of Cantilupe and Giffard, his support was strongly sought after by Henry III and Simon de Montfort throughout the Second Barons' War.

The Wexford Carols (Caitríona O'Leary album): The Wexford Carols is a 2014 album of traditional Irish carols by Caitríona O'Leary featuring guest singers Tom Jones, Rosanne Cash and Carolina Chocolate Drops singer Rhiannon Giddens produced by Joe Henry.  The carol texts are mainly taken from the collections by Bishop Luke Wadding (1684) and Father William Devereux (1728).  In the case of Devereux's carols, the tunes were not indicated, so O'Leary matched surviving folk tunes fitting the poems.  The song "The Darkest Midnight" was learned from the 1982 album "Darkest Midnight" by singer Nóirín Ní Riain and the monks of Glenstal Abbey.  The album went to No.1 on the Billboard World Albums Chart.

Stephen Devereux: Stephen Devereux (c. 1191 – 1228) was a powerful Marcher Lord, and held Lyonshall Castle controlling an important approach to the border of Wales.  As a key member of William Marshal, 1st Earl of Pembroke retinue, he played a significant role in the Earl's support of King John during the First Barons' War, and during the minority of Henry III.

Supporting paragraphs: William Devereux, Baron Devereux of Lyonshall Edward I of England
Answer: Edward I