The Castelowe 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 Castelowe, 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 Castelowe family
The surname Castelowe 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
Early History of the Castelowe family
This web page shows only a small excerpt of our Castelowe research.Another 275 words (20 lines of text) covering the years 1172, 1500, 1803 and 1865 are included under the topic Early Castelowe History in all our PDF Extended History products and printed products wherever possible.
Castelowe Spelling Variations
Church officials and medieval scribes often spelled early surnames as they sounded. This practice often resulted in many spelling variations
of even a single name. Early versions of the name Castelowe included: Costello, MacCostello, Costillo, Costallo, Kostello, McCostello, Caustello, Costellow and many more.
Early Notables of the Castelowe family (pre 1700)
More information is included under the topic Early Castelowe Notables in all our PDF Extended History products
and printed products wherever possible.
Migration of the Castelowe family to the New World and Oceana
In the mid-19th century, Ireland
experienced one of the worst periods in its entire history. During this decade in order to ease the pressure of the soil, which was actually depleted by the effects of the previous years' grain crops, landowners forced tenant
farmers and peasants onto tiny plots of land that barely provided the basic sustenance a family required. Conditions were worsened, though, by the population of the country, which was growing fast to roughly eight million. So when the Great Potato Famine
of the mid-1840s hit, starvation and diseases decimated the population. Thousands of Irish families
left the country for British North America and the United States. The new immigrants were often accommodated either in the opening western frontiers or as cheap unskilled labor in the established centers. In early passenger and immigration lists there are many immigrants bearing the name Castelowe: Honor Costello who landed in America in 1756; Bernard, Cornelius, Edward, Hugh, J.B. James, John, John B. Lawrence, Mark, Michael, Neal, Patrick, Peter, Philip, Thomas, Timothy, and William Costello, all landed in Philadelphia, Pennsylvania between 1833 and 1874.
The Castelowe 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.