Show ContentsMostyn History, Family Crest & Coats of Arms

Etymology of Mostyn

What does the name Mostyn mean?

The ancestors of the bearers of the Mostyn surname lived in or near the Welsh settlement of Mostyn in Whitford. The surname Mostyn belongs to the category of habitation names, which are derived from pre-existing names for towns, villages, parishes, or farmsteads.

Early Origins of the Mostyn family

The surname Mostyn was first found in Flintshire (Welsh: Sir y Fflint), a historic county, created after the defeat of the Welsh Kingdom of Gwynedd in 1284, and located in north-east Wales, where they were descended from one of the fifteen noble tribes of Wales. In the 12th century they were Lords of the Manor of Mostyn, seated at Mostyn Hall. At the taking of the Domesday Book in 1086 Mostyn, was held by Robert of Rhuddlan from whom they may also be conjecturally descended. Another branch of the family was found in Moston, Cheshire. "The manor, in old records "Moreston," was given about 1125 to the convent of St. Werburgh, under which an estate was held here by a family who took their name from the township." 1

Early History of the Mostyn family

This web page shows only a small excerpt of our Mostyn research. Another 112 words (8 lines of text) covering the years 1567, 1621, 1622, 1642 and 1925 are included under the topic Early Mostyn History in all our PDF Extended History products and printed products wherever possible.

Mostyn Spelling Variations

Although there are not an extremely large number Welsh surnames, there are an inordinately large number of spelling variations of those surnames. This variety of spellings began almost immediately after the acceptance of surnames within Welsh society. As time progressed, these old Brythonic names were eventually were recorded in English. This process was problematic in that many of the highly inflected sounds of the native language of Wales could not be properly captured in English. Some families, however, did decide to modify their own names to indicate a branch loyalty within the family, a religious adherence, or even a patriotic affiliation. The name Mostyn has seen various spelling variations: Mostyn, Mostin, Mostyne, Mosten, Mostine and others.

Early Notables of the Mostyn family

Prominent amongst the family during the late Middle Ages was

  • Lord Mostyn

Migration of the Mostyn family

In the late 19th and early 20th centuries, many people from Wales joined the general migration to North America in search of land, work, and freedom. These immigrants greatly contributed to the rapid development of the new nations of Canada and the United States. They also added a rich and lasting cultural heritage to their newly adopted societies. Investigation of immigration and passenger lists has revealed a number of people bearing the name Mostyn: John Mosten arrived in North America in 1750.


Contemporary Notables of the name Mostyn (post 1700) +

  • John Steven Mostyn (1971-2017), American attorney and the founder of Mostyn Law in Houston, Texas
  • William H. Mostyn, American Democratic Party politician, Candidate for U.S. Representative from New York 39th District, 1956 2
  • Sir Roger Mostyn (1673-1739), 3rd Baronet was a Welsh politician, Member of Parliament for Flintshire (1701–1702)
  • Francis Edward Joseph Mostyn (1860-1939), Welsh prelate in the Roman Catholic Church, Archbishop of Cardiff (1921 to 1939)
  • John Mostyn (1709-1779), British soldier and colonial administrator, Governor of Minorca (1768-1778)
  • General Sir Joseph David Frederick Mostyn KCB CBE (1928-2007), British soldier, Adjutant-General to the Forces
  • Sir Nicholas Anthony Joseph Ghislain Mostyn (b. 1957), British High Court of Justice justice
  • Savage Mostyn (1713-1757), English officer of the Royal Navy, Member of Parliament, Comptroller of the Navy
  • Francis George Mostyn (1800-1847), English prelate in the Roman Catholic Church, Vicar Apostolic of the Northern District of England (1840 to 1847)
  • Sir Mostyn Hanger, Chief Justice of the Supreme Court of Queensland, Australia


The Mostyn 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: Auxilium meum a Domino
Motto Translation: My help is from the Lord.


  1. Lewis, Samuel, A Topographical Dictionary of England. Institute of Historical Research, 1848, Print.
  2. The Political Graveyard: Alphabetical Name Index. (Retrieved 2016, January 8) . Retrieved from http://politicalgraveyard.com/alpha/index.html


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