Costeley History, Family Crest & Coats of Arms

The Costeley surname came to Ireland with the Anglo-Norman invasion of the 12th century. They were originally from the Norman family Nangles, or de Angulos, and descended in Ireland from Gilbert de Nangle. Costello and associated variations come from the personal name of a son of Gilbert, Oisdealbhach, whose name consists of the elements "os," which means "deer or fawn", and "dealbhadh," which means "in the form of" or "resembling." The Gaelic form of the surname Costeley, which predated the Anglicized version of the name, is Mac Oisdealbhaigh. This is the earliest recorded example of a Norman family assuming a Mac surname. The prefix O has sometimes been erroneously assumed.

Early Origins of the Costeley family

The surname Costeley was first found in County Mayo (Irish: Maigh Eo) located on the West coast of the Republic of Ireland in the province of Connacht, where they were granted lands by the Earl of Pembroke in the Anglo-Norman invasion of 1172.

Early History of the Costeley family

This web page shows only a small excerpt of our Costeley research. Another 138 words (10 lines of text) covering the years 1172, 1500, 1531, 1606, 1803, 1865, 1531, 1579, 1567, 1571 and 1606 are included under the topic Early Costeley History in all our PDF Extended History products and printed products wherever possible.

Costeley Spelling Variations

It was found during an investigation of the origins of the name Costeley that church officials and medieval scribes often spelled the name as it sounded. This practice lead to a single person's being documented under many spelling variations. The name Costeley has existed in the various shapes: Costello, MacCostello, Costillo, Costallo, Kostello, McCostello, Caustello, Costellow and many more.

Early Notables of the Costeley family (pre 1700)

Notable amongst the family up to this time was Guillauame Costeley (1531-1606), Scottish organist and 'valet du chambre du roy' to Henry II and Charles IX of France. [1] Arthur Dudley Costello (1803-1865), was an English-born Irish novelist and travel writer. William Costeley was a Scottish musician, born 1531, settled in France, and was organist to Henri II and Charles IX. Author of a treatise called...
Another 65 words (5 lines of text) are included under the topic Early Costeley Notables in all our PDF Extended History products and printed products wherever possible.


Australia Costeley migration to Australia +

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

Costeley Settlers in Australia in the 19th Century
  • Mr. Deninus Costeley, Scottish stone cutter who was convicted in Perth, Scotland for 7 years for receiving, transported aboard the "Elphinstone" on 27th May 1837, arriving in Tasmania (Van Diemen's Land) [2]


The Costeley 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: Ne te quaesiveris extra
Motto Translation: Seek nothing beyond your sphere.


  1. ^ Smith, George (ed), Dictionary of National Biography. London: Smith, Elder & Co., 1885-1900. Print
  2. ^ Convict Records Voyages to Australia (Retrieved 18th March 2022). Retrieved from https://convictrecords.com.au/ships/elphinstone


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