Seisyll ap Dyfnwal, arglwydd of Castell Arnallt

Abt 1140 - 1177  (37 years)

• Name	Seisyll ap Dyfnwal   [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
  Suffix	arglwydd of Castell Arnallt
  Born	Abt 1140	of, Castell Arnallt, Llangatwg Dyffryn Wysg, Llanofer Fawr, Monmouthshire, Wales
  Christened	{Tribe: Ynyr Gwent}
  Gender	Male
  Died	25 Dec 1177	Y Fenni, Monmouthshire, Wales   [12, 13]
  Person ID	I100020500	My Genealogy
  Last Modified	16 Apr 2012

  
  

  Family	Gwladus ferch Gruffudd,   b. Abt 1100, of, , Carmarthenshire, Wales ,   d. Yes, date unknown
  Married	Yes, date unknown
  	(Research) DESCENDANTS: Conflict/Error> Bradney's 'History of Monmouthshire' volume 1 page 335 gives them a son named Dafydd who had issue.
  Last Modified	10 Jun 2007
  Family ID	F100013235	Group Sheet  |  Family Chart

  
  

• Notes

  PROPERTY: His castle was called Castell Arnallt, situated in the parish of Llangattwg-nigh-Usk. (Bradney, History of Monmouthshire, vol. 1 p. 146) PROPERTY: He took the castle of Abergavenny {Y Fenni} in 1172 and retained possesion of it till 1176, when, through the intercession of Rhys ap Gruffudd, whose sister he had married, it was restored to William de Braose. (Bradney, History of Monmouthshire, vol. 1 p. 146) DEATH: William de Braose invited Seisyll ap Dyfnal to Abergavenny castle on Christmas day, 1177. Seisyll and his retainers were attacked by de Braose's men while they were feasting, unarmed, and were all murdered. William de Braose then marched to Castell Arnallt, razed it to the ground, slew Cadwaladr ap Seisyll, before his mother's eyes and took her prisoner to Abergavenny. (Bradney, History of Monmouthshire, vol. 1 p. 146, 331, 332, 335) REMARKS: He was one of the "Welsh petty kings who had never become reconciled to the Norman rule". (Bradney, History of Monmouthshire, vol. 1 p. 146) PROPERTY: His castle was called Castell Arnallt, situated in the parish of Llangattwg-nigh-Usk. (Bradney, History of Monmouthshire, vol. 1 p. 146) PROPERTY: He took the castle of Abergavenny {Y Fenni} in 1172 and retained possesion of it till 1176, when, through the intercession of Rhys ap Gruffudd, whose sister he had married, it was restored to William de Braose. (Bradney, History of Monmouthshire, vol. 1 p. 146) DEATH: William de Braose invited Seisyll ap Dyfnal to Abergavenny castle on Christmas day, 1177. Seisyll and his retainers were attacked by de Braose's men while they were feasting, unarmed, and were all murdered. William de Braose then marched to Castell Arnallt, razed it to the ground, slew Cadwaladr ap Seisyll, before his mother's eyes and took her prisoner to Abergavenny. (Bradney, History of Monmouthshire, vol. 1 p. 146, 331, 332, 335) REMARKS: He was one of the "Welsh petty kings who had never become reconciled to the Norman rule". (Bradney, History of Monmouthshire, vol. 1 p. 146)

  
  

• Sources

  [S100000673] #1079 A History of Monmouthshire from the Coming of the Normans into Wales down to the Present Time (1904-1993), Bradney, Sir Joseph Alfred, (Publications of the South Wales Record Society, number 8. Five volumes in 13. London: Mitchell, Hughes and Clarke, 1904-1993), FHL book 942.43 H2b., vol. 1 p. 146, 331. 335*, 338; vol. 3 p. 187. [S100002411] #11915 British Genealogy (filmed 1950), Evans, Alcwyn Caryni, (Books A to H. National Library of Wales MSS 12359-12360D. Manuscript filmed by the Genealogical Society of Utah, 1950), FHL microfilms 104,355 and 104,390 item 2., book 5 p. E19*. [S100002434] #2105 Heraldic Visitations of Wales and Part of the Marches Between the Years 1586 and 1613 by Lewys Dwnn (1846), Dwnn, Lewys; transcribed and edited with notes by Sir Samuel Rush Meyrick, (2 volumes. Llandovery: William Rees, 1846), FHL book 942.9 D23d; FHL microfilm 176,668., vol. 2 p. 46. [S100002437] #4568 Welsh Genealogies, AD 300-1400 (1980), Bartrum, Peter C. (Peter Clement), (25 volumes, with supplements containing additions and corrections. [Wales]: University of Wales Press, 1980), FHL book 942.9 D2bp; FHL microfiche 6025561., vol. 4 p. 242; vol. 10 p. 758, 776, 808; vol. 12 p. 938. [S100004687] Miscellanea Genealogica et Heraldica, Authors Vary, (London: Hamilton, Adams, 1868-1938), FHL 942 B2m., 5th ser. vol. 5 p. 184. [S100004934] Prosiect AHRC ar Welsh Genealogies P.C. Bartum (2010), Bartum, Peter C., (Aberystwyth University. Welsh Department. AHRC Project on P.C. Bartum's Welsh Genealogies (2010). (http://cadair.aber.ac.uk)), Rhydderch ab Iestyn 1> http://cadair.aber.ac.uk/dspace/bitstream/handle/2160/5268/rhydderch%20ap%20iestyn%201.png?sequence=1. [S100005033] #235 The History and Antiquities of the County of Buckingham (1847), Lipscomb, George, (Four volumes. London: J. & W. Robins, 1847), FHL book Q 942.575 H2Li; FHL microfilms 990,261-99., vol. 1 p. 68. [S200000673] #1079 A History of Monmouthshire from the Coming of the Normans into Wales down to the Present Time (1904-1993), Bradney, Sir Joseph Alfred, (Publications of the South Wales Record Society, number 8. Five volumes in 13. London: Mitchell, Hughes and Clarke, 1904-1993), FHL book 942.43 H2b., vol. 1 p. 146, 331. 335*, 338; vol. 3 p. 187. [S200004687] Miscellanea Genealogica et Heraldica, Authors Vary, (London: Hamilton, Adams, 1868-1938), FHL 942 B2m., 5th ser. vol. 5 p. 184. [S200004934] Prosiect AHRC ar Welsh Genealogies P.C. Bartum (2010), Bartum, Peter C., (Aberystwyth University. Welsh Department. AHRC Project on P.C. Bartum's Welsh Genealogies (2010). (http://cadair.aber.ac.uk)), Rhydderch ab Iestyn 1> http://cadair.aber.ac.uk/dspace/bitstream/handle/2160/5268/rhydderch%20ap%20iestyn%201.png?sequence=1. [S200005033] #235 The History and Antiquities of the County of Buckingham (1847), Lipscomb, George, (Four volumes. London: J. & W. Robins, 1847), FHL book Q 942.575 H2Li; FHL microfilms 990,261-99., vol. 1 p. 68. [S100000673] #1079 A History of Monmouthshire from the Coming of the Normans into Wales down to the Present Time (1904-1993), Bradney, Sir Joseph Alfred, (Publications of the South Wales Record Society, number 8. Five volumes in 13. London: Mitchell, Hughes and Clarke, 1904-1993), FHL book 942.43 H2b., vol. 1 p. 146, 335. [S200000673] #1079 A History of Monmouthshire from the Coming of the Normans into Wales down to the Present Time (1904-1993), Bradney, Sir Joseph Alfred, (Publications of the South Wales Record Society, number 8. Five volumes in 13. London: Mitchell, Hughes and Clarke, 1904-1993), FHL book 942.43 H2b., vol. 1 p. 146, 335.