Show ContentsCasement History, Family Crest & Coats of Arms

The distinguished surname Casement emerged among the industrious people of Flanders, which was an important trading partner and political ally of Britain during the Middle Ages. As a result of the frequent commercial intercourse between the Flemish and English nations, many Flemish migrants settled in Britain. In early times, people were known by only a single name. However, as the population grew and people traveled further afield, it became increasingly necessary to assume an additional name to differentiate between bearers of the same personal name. One of the most common classes of surname is the patronymic surname, which was usually derived from the first name of the person's father. Flemish surnames of this type are often characterized by the diminutive suffix -kin, which became very frequent in England during the 14th century. The surname Casement is derived from Mac Asmundr. This is derived from the Celtic word Mac, which means son, and the Old Norse name Asmundr, which literally means god protector. Many Scandinavian personal names were left in the British Isles as a legacy of the Viking raids which plagued the coastal regions of Britain from the 8th to 10th centuries. 1

Early Origins of the Casement family

The surname Casement was first found in Glamorganshire where they had been granted lands from about the year 1550.

Early History of the Casement family

This web page shows only a small excerpt of our Casement research. Another 93 words (7 lines of text) covering the year 1640 is included under the topic Early Casement History in all our PDF Extended History products and printed products wherever possible.

Casement Spelling Variations

Flemish surnames are characterized by a large number of spelling variations. One reason for this is that medieval English lacked definite spelling rules. The spellings of surnames were also influenced by the official court languages, which were French and Latin. Names were rarely spelled consistently in medieval times. Scribes and church officials recorded names as they sounded, rather than adhering to specific spelling rules, and people often had their names registered in several different forms throughout their lives. One of the greatest reasons for change is the linguistic uniqueness of the Flemish settlers in England, who spoke a language closely related to Dutch. The pronunciation and spelling of Flemish names were often altered to suit the tastes of English-speaking people. In many cases, the first, final, or middle syllables of surnames were eliminated. The name has been spelled Casement, Casment and others.

Early Notables of the Casement family

Prominent in the family at this time was

  • Colonel William Casement

Ireland Migration of the Casement family to Ireland

Some of the Casement family moved to Ireland, but this topic is not covered in this excerpt. More information about their life in Ireland is included in all our PDF Extended History products and printed products wherever possible.


United States Casement migration to the United States +

The records on immigrants and ships' passengers show a number of people bearing the name Casement:

Casement Settlers in United States in the 19th Century
  • Robert Casement who arrived in Philadelphia, Pennsylvania in 1837
  • H. Casement, who was on a ship passenger list arriving in San Francisco in 1850
  • H, Casement Jr., who landed in San Francisco, California in 1850 2
  • John Casement, aged 13, who arrived in New York in 1854 2
  • Mrs. Casement, aged 34, who arrived in New York in 1854 2
  • ... (More are available in all our PDF Extended History products and printed products wherever possible.)

Australia Casement migration to Australia +

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

Casement Settlers in Australia in the 19th Century
  • Miss Emily Casement, (b. 1833), aged 20, English milliner, from Bermondsey, London, England, UK travelling aboard the ship "Rattler" arriving in New South Wales, Australia on 6th January 1853 3
  • Miss Anne Casement, (b. 1835), aged 18, English milliner, from Lambeth, London, England, UK travelling aboard the ship "Rattler" arriving in New South Wales, Australia on 6th January 1853 3
  • Miss Jane Casement, (b. 1837), aged 16, English milliner, from Bermondsey, London, England, UK travelling aboard the ship "Rattler" arriving in New South Wales, Australia on 6th January 1853 3
  • Mr. William Casement, (b. 1840), aged 13, English settler, from Bermondsey, London, England, UK travelling aboard the ship "Rattler" arriving in New South Wales, Australia on 6th January 1853 3
  • Miss Susan Casement, (b. 1841), aged 12, English settler, from Walworth, Lambeth, London, England, UK travelling aboard the ship "Rattler" arriving in New South Wales, Australia on 6th January 1853 3
  • ... (More are available in all our PDF Extended History products and printed products wherever possible.)

Contemporary Notables of the name Casement (post 1700) +

  • Frances Jennings Casement (1840-1928), American suffragette and voting advocate
  • John Stephen "Jack" Casement (1829-1909), American general and brigade commander in the Union Army during the American Civil War; he also directed the constructional phase of the Transcontinental Railroad
  • Sir Roger David Casement (1864-1916), Irish consul, diplomat, activist, nationalist and poet executed for treason, described as the "father of twentieth-century human rights investigations"
  • William Robert Casement, American Clergyman and Educator, Massachusetts
  • Christopher Casement (b. 1988), Northern Irish professional footballer

HMS Prince of Wales
  • Mr. Roy Samuel Casement, British Lieutenant Commander, who sailed into battle on the HMS Prince of Wales (1941) and survived the sinking 4


The Casement Motto +

The motto was originally a war cry or slogan. Mottoes first began to be shown with arms in the 14th and 15th centuries, but were not in general use until the 17th century. Thus the oldest coats of arms generally do not include a motto. Mottoes seldom form part of the grant of arms: Under most heraldic authorities, a motto is an optional component of the coat of arms, and can be added to or changed at will; many families have chosen not to display a motto.

Motto: Dum Spiro Spero
Motto Translation: While I have breath I hope.


  1. Reaney, P.H and R.M. Wilson, A Dictionary of English Surnames. London: Routledge, 1991. Print. (ISBN 0-415-05737-X)
  2. 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)
  3. Cornwall Online Parish Clerks. (Retrieved 3rd May 2018). Retrieved from http://www.opc-cornwall.org/Resc/pdfs/emigration_1850_59.pdf
  4. HMS Prince of Wales Crew members. (Retrieved 2014, April 9) . Retrieved from http://www.forcez-survivors.org.uk/biographies/listprincecrew.html


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