Contents and Preface:Download

1/. IntroductionChapter 1.

Sennett & variants:
  1. History and Geography of the surname
  2. Surname Identity: A Modern Conundrum & Y-Chromosome DNA [E-M35, E-L117, E-V13, R-M269]
  3. An Hiberno Cambro-Anglo/Norman-Flemish surname (Flemish: Flanders, in Belgium & France)
  4. The Cambro-Norman-Flemish case for surname origin in Wales, England, Normandy & Flanders

2/. Flemings in Wales, Ireland and Wexford under the Cambro-Norman orderChapter 2.

  1. Wexford and Leinster before the Cambro-Norman-Flemish Invasion (1167-to-1171), and the role of the Vatican
  2. Flemings in Norman England and Norman South Wales (and Scottish Borders), & the Exon Domesday Book of 1086
  3. Pre-Invasion Flemings in Sth. Pembrokeshire [Haverfordwest, Rhos, Roose (100th)& Roch Castle] 2.3/ Appendix: St Andrews
  4. The Norman Invasion (Cambro-Norman-Flemish Invasion) of Wexford, Leinster & Ireland -Timescale and Leadership
  5. Post-Invasion Flemings in Norman Wexford, and Anglo-Norman Ireland 2.4/ Appendix: 'de Clare' & 'Marshal' families

3/. Wexford Society and Sennett in the Anglo Cambro-Norman AgeChapter 3.

  1. The general documentary manuscript record in Ireland after Cambro-Norman-Flemish Invasion of 1167-71
  2. The Anglo-Saxon surname attribution in British, Irish and American Surname Dictionaries
  3. The surname at Annamult in Kilkenny & Wexford: Earliest Documentary Records & Fleming associations
  4. Recorded Land Inheritance and leasehold 'feodaries' and 'fee' tenures in Wexford County, 1245 -to- 1425
  5. Earl William Marshal family's inheritance and the 'Munchensy' & 'de Valence' Purparty (Landed Estate)
  6. Wexford Land Feodaries (with scutage-tax option) & Fees (military service obligation) & early Sennett townlands
  7. Wexford in War and Peace, 3 later periods of rebellion and civil strife in Wexford history, 1649, 1798, 1847

4/. The Case for an Alternative English or French OriginChapter 4.

  1. Anglo-Saxon England: Potential Sennett Origin in Hertfordshire, Cambridgeshire, or East Anglian and Saxon Counties
    1. Anglo-Saxon case for Sennett Origin: Domesday Book, and a possible case of spelling 'Convergence'
    2. The Anglo-Saxon Sennett record: documented incidence and its published & un-published regional sources
    3. Research Appeal to readership of English origin (ie. of possible Anglo-Saxon origin): and Contact Guide
  2. France: Potential Origins in Normandy, Brittany, Pas de Calais, Anjou, Acquitaine etc. (pre-Wales, France or Flanders?)
    1. The Gallo-Norman case for Sennett Origin: Princess Matilde, Le Cygne, Val de la Sennette & French Heraldry
    2. The 'a, b and c' of the more romantic notions of Sennett French-connection: de Valence, de Lusignan, etc.

5/. Origin of the surname – ConclusionChapter 5.

  1. Sennett surname incidence in Ireland & GB over time, 1640s, 1825-to-1890, & 1996-to-2016, & 2018'Worldwide
  2. The Sennett DNA paternity marker within specific Y-Chromosome haplogroup [ E-M35 /E-L117, E1b1b1a1b1a, and E-V13]
  3. Sennett, Sinnott & Synnott: Heraldry and sources relating to Arms, Crests & Mottoes [ref. Burke's, Fairbairn's, Elvin's]
  4. Military Memento of recent times and a Great War Centenary 1918 - 2018 Memorial
  5. Historical Postscript: Sunday, 21st November 1920, Irish Free State 'Independence', and late phase Irish emigration
  6. Irish Family Records 1976, Abbreviations, Publ'ed Bibliography, Mss.sources, Extra Bibliog., Miscellanea, Annamult
  7. Early American lives: (Ireland, Britain, the Dominions -Australia,Canada,New Zealand, Asian & Women additions tba)


There are many variants of the surname Sennett, with the 'n' and/or 't' being either single or double, and the 'e' being replaced by the other vowels 'a','i','o','u','y' in combination. Most common are Sennett, Sinnett, Sinnott, and Synnott. This paper examines the possible origin or origins of the name, and places it in its historical context. It was written to provide background to the Sennett Project on This document encompasses all of the surname variants. Please note, the variant 'Sennett' is generally used to represent the many other spelling variants. Most of the Anglophone, Francophone & Irish-Gaelic variants in use in modern times are listed below, along with many of the more multi-lingual versions from older times. It remains unknown whether an ancient Cambro-Flemish version is anywhere on the record.

Modern 'Sennett' forms:
Sennette, Sennitt, Sennott, Sinnatt, Sinnett, Sinnitt, Sinnott, Sinnotte, Sennet, Sennit, Sennot, Sinnat, Sinnet, Sinnit, Sinnot, Synnat, Synnet, Senett, Senette, Senitt, Senott, Sinatt, Sinett, Sinitt, Sinott, Sinotte, Synatt, Synett, Synott, Synnot, Synnatt, Synnett/e, Synnitt, Synnott, Senet, Senot, Sinat, Sineath, Sinot, Sinut, [Senit,Sinet,Sinit, Fr.Canada] Seynde, Signot, Sinhit, Sinoti, Synat, Synet, Synot, Synote, Synut, Senota, Sunnota, Sunnotoe, Sunnett, Sunnott [Sunod], Hart-Synnot.
Some common handwritten or registration transcription errors:
Fennet, Fennot, Finnot, Lennott, Linnett, Linnott.
Ancient 'Sennett' forms:
Sionóid, sometime Sinóid (Irish-Gaelic, translation)
Shynnaghe (Brooks 'Knights Fees' IMC, possibly 'Yola' dialect)
Sigenõð, Sigenõth (Anglo-Saxon, 'Victory Brave' translation)
Sinod, Sinoth/i, Sinothe (Domesday, Latin translation 1086)
Sinad, Sinath (Latin M'script, DuiskeAbbey, Kilkenny Co.1204)
Sinodus, Sinothus, (Latinised Mid-English, 'The Norman People')
FitzSinath (Duiske Abbey CharterNo2, RIA Prcdgs.Vol.35c,1918)
Synad, Synod, Synach, Synagh, Synath, Sygnitt, Synodus.