Show ContentsTrethewey History, Family Crest & Coats of Arms

Trethewey is a name that came to England in the 11th century wave of migration that was set off by the Norman Conquest of 1066. The Trethewey family lived in Cornwall, at the village of Tewardevi, from which their name is derived.

Early Origins of the Trethewey family

The surname Trethewey was first found in Cornwall where they held a family seat from early times. There is also some evidence to believe that they were descended from Richard of Trethewey, a Norman knight, who held this village from the Count of Mortaine during the Norman occupation as recorded in the Domesday Book taken in 1086.

Early History of the Trethewey family

This web page shows only a small excerpt of our Trethewey research. Another 44 words (3 lines of text) are included under the topic Early Trethewey History in all our PDF Extended History products and printed products wherever possible.

Trethewey Spelling Variations

The English language only became standardized in the last few centuries. For that reason, spelling variations are common among many Anglo-Norman names. The shape of the English language was frequently changed with the introduction of elements of Norman French, Latin, and other European languages; even the spelling of literate people's names were subsequently modified. Trethewey has been recorded under many different variations, including Trethewey, Trethewy, Trethevy, Threthaway, Treadaway and many more.

Early Notables of the Trethewey family

Notable amongst the family at this time was

  • Richard of Trethewey of Cornwall


United States Trethewey migration to the United States +

To escape the uncertainty of the political and religious uncertainty found in England, many English families boarded ships at great expense to sail for the colonies held by Britain. The passages were expensive, though, and the boats were unsafe, overcrowded, and ridden with disease. Those who were hardy and lucky enough to make the passage intact were rewarded with land, opportunity, and social environment less prone to religious and political persecution. Many of these families went on to be important contributors to the young nations of Canada and the United States where they settled. Tretheweys were some of the first of the immigrants to arrive in North America:

Trethewey Settlers in United States in the 18th Century
  • Samuel Trethewey who arrived in Allegany (Allegheny) county, Pennsylvania in 1765
Trethewey Settlers in United States in the 19th Century
  • Samuel Trethewey, who arrived in Allegany (Allegheny) County, Pennsylvania in 1869 1

Australia Trethewey migration to Australia +

Emigration to Australia followed the First Fleets of convicts, tradespeople and early settlers. Early immigrants include:

Trethewey Settlers in Australia in the 19th Century
  • Mr. Luck Trethewey, (b. 1856), aged 21, Cornish tin miner travelling aboard the ship "Earl Dalhousie" arriving in Sydney, New South Wales, Australia on 7th May 1877 2
  • Mr. Samuel Trethewey, (b. 1865), aged 21, Cornish farm labourer travelling aboard the ship "SS Energia" arriving in Sydney, New South Wales, Australia on 4th June 1886 2

New Zealand Trethewey migration to New Zealand +

Emigration to New Zealand followed in the footsteps of the European explorers, such as Captain Cook (1769-70): first came sealers, whalers, missionaries, and traders. By 1838, the British New Zealand Company had begun buying land from the Maori tribes, and selling it to settlers, and, after the Treaty of Waitangi in 1840, many British families set out on the arduous six month journey from Britain to Aotearoa to start a new life. Early immigrants include:

Trethewey Settlers in New Zealand in the 19th Century
  • Mr. Joshua Trethewey, (b. 1850), aged 24, Cornish farm labourer departing on 25th September 1874 aboard the ship "Crusader" arriving in Lyttelton, Canterbury, New Zealand on 31st December 1874 3

Contemporary Notables of the name Trethewey (post 1700) +

  • Thomas George Trethewey (b. 1944), American competition swimmer at the 1964 Summer Olympics
  • Richard S. Trethewey (b. 1955), American plumber and HVAC contractor, best known for his regular appearances on This Old House, Ask This Old House and Inside This Old House
  • Natasha Trethewey (b. 1966), American poet awarded won the 2007 Pulitzer Prize in poetry, United States Poet Laureate in 2012 and in 2014
  • Frederick Martyn "Fred" Trethewey (b. 1949), English prelate, Archdeacon of Dudley (2001-2013)
  • William G. Trethewey (1865-1926), Canadian mining engineer who discovered silver in the Cobalt area in 1904, owner of the Trethewey Air Field in Toronto, Canada in 1910; his son sold the property to de Havilland Aircraft Company of England in 1928
  • Robert Hugh Trethewey (1902-1989), Australian politician, Member of the Victorian Legislative Assembly for Bendigo (1964-1973)
  • William Thomas Trethewey (1892-1956), New Zealand sculptor and monumental mason from Christchurch, best known for his Citizens' War Memorial in Cathedral Square, Christchurch


  1. Filby, P. William, Meyer, Mary K., Passenger and immigration lists index : a guide to published arrival records of about 500,000 passengers who came to the United States and Canada in the seventeenth, eighteenth, and nineteenth centuries. 1982-1985 Cumulated Supplements in Four Volumes Detroit, Mich. : Gale Research Co., 1985, Print (ISBN 0-8103-1795-8)
  2. Cornwall Online Parish Clerks. (Retrieved 2018, April 19). Emigrants to Australia NSW 1860 -88 [PDF]. Retrieved from http://www.opc-cornwall.org/Resc/pdfs/nsw_passenger_lists_1860_88.pdf
  3. Cornwall Online Parish Clerks. (Retrieved 2018, April 30). Emigrants to Lyttelton 1858-84 [PDF]. Retrieved from http://www.opc-cornwall.org/Resc/pdfs/new_zealand_assisted.pdf


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