SINNOTT
Sinnott is a surname of considerable antiquity, found primarily within the British Isles and, in particular, Ireland, where it attains its greatest frequency. The name has multifaceted origins, both Gaelic and Anglo‑Norman, and has survived into the modern era with a variety of orthographic variants such as Sinnott, Sinnat, Senett, Sinnett and Synnot.
The earliest recorded derivation is the Gaelic surname Ó Siônnaigh, meaning “descendant of Sionach.” The personal name Sionach translates to “fox,” a motif that was common in Irish onomastics. This form of the name is principally associated with County Wexford in southeastern Ireland, where the Sinnott lineage was historically a sept of the larger MacMurrough‑Kavanagh clan. The use of the name in Wexford dates back to the thirteenth century, and members of the family held extensive estates and public office during the period following the Norman invasion of 1170, until the upheavals of Cromwellian rule.
Another linguistic stream traces Sinnott back to the Old English personal names Sigenoth and Sinod, which together convey the sense “victory‑brave” from the elements sige (victory) and noth (brave). The earliest attestation of this line appears as Synodus in a 1095 document from the Abbey of Bury St. Edmunds in Suffolk. The name underwent anglicisation and became widely adopted in County Wexford, where it ranked among the most numerous Anglo‑Norman families, as documented in the Hundred Rolls of Suffolk and later by individuals such as Stephen Sinot (1275), David Synnot (Governor of Wexford), and Colonel Oliver Synnot (1650).
In a distinct Gaelic tradition, Sinnott is also an anglicised form of Ó Siadhnait, originating from the personal name Siadhne, which likely signified a “generous one.” The first bearers of this surname are recorded in County Leitrim in Connacht, before spreading to Tipperary and Galway in Munster, and ultimately throughout Ireland and the diaspora. A prominent modern bearer of the name was James “Jim” Sinnott, an Irish Republican Army officer during the War of Independence who later became a senator, illustrating the continued political and social influence of the family line.
A further source indicates that Sinnott can derive from the Old Irish Mac Senachta, meaning “son of Senacht,” linking the name to the McCarthy clan and the Iffernan territory of County Cork. This origin is reflected in a wide array of orthographic variants, including all those listed above, and explains the surname’s presence in England and North America alongside its Irish heritage.
Statistical records corroborate the widespread nature of the surname. In Ireland it ranks as the fifty‑second most common surname, with a pronounced concentration in County Wexford. The United Kingdom census of 2011 records 1,032 occurrences, while the United States census of 2020 lists it as the 1,846th most common surname, predominantly found in eastern states such as Massachusetts, New York, Pennsylvania and Michigan. The name also appears across the Commonwealth and former British colonies: in Canada it is the eighth most common surname in Newfoundland and Labrador, in Australia it is common in New South Wales, and in South Africa it ranks fourth in the Western Cape. These figures underscore the enduring legacy and global dispersion of the Sinnott lineage.
Collectively, the documented origins, historical prominence, and contemporary distributions of Sinnott illustrate a surname that embodies loyalty, strength and tradition, enduring in both its Gaelic roots and its Anglo‑Norman heritage across generations and continents.
Typical given names associated with the Sinnott surname
Male
- Andrew
- David
- James
- John
- Mark
- Michael
- Patrick
- Paul
- Peter
- Robert
- William
Female
- Catherine
- Elizabeth
- Gillian
- Julie
- Karen
- Lisa
- Louise
- Margaret
- Mary
- Maureen
- Sarah
- Susan
Similar and related surnames
Related and similar names are generated algorithmically based on the spelling, and may not necessarily share an etymology.
How to communicate the surname Sinnott in...
Braille
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Morse
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Semaphore
There are approximately 1,962 people named Sinnott in the UK. That makes it roughly the 4,269th most common surname in Britain. Around 30 in a million people in Britain are named Sinnott.
Surname type: Diminutive
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English
Famous people named Sinnott
- Lee Sinnott - Football player, football manager
- Jordan Sinnott - Football player
- Steve Sinnott - General Secretary of the NUT (1951 to 2008)
- Richard Sinnott - Actor
Names and descriptions courtesy of Wikipedia, and may contain errors. This is not intended to be an exhaustive list of every famous person with this name.