Byrnal History, Family Crest & Coats of Arms
The surname is one of the Anglo-Norman surnames that came to Ireland in the 12th century. Ireland already had an established system of hereditary surnames, often the two traditions blended together quite well, but the incoming Anglo-Normans also brought with them local surnames, such as Byrnal. Local names were taken from the names of a place or a geographical feature where the person lived, held land, or was born, some from places in Normandy, or more typically, from England. Originally, the place names were prefixed by de, which means from in French. This type of prefix was eventually either made a part of the surname if the place name began with a vowel or was eliminated entirely. The Byrnal family appears to have originally lived in either of the settlements called Barnwell in the English counties of Cambridge and Northumberland. The Gaelic form of the surname Byrnal is de Bearnabhal.
Early Origins of the Byrnal family
The surname Byrnal was first found in County Meath at Crickstown Castle. "De Bernvale, accompanied William the Conqueror to England in 1066. He came from Lower Brittany, and was allied to the dukes of that province" 
Another source is more specific: "Sir Michael de Berneval, a scion of the family founded by the Norman knight, joined the English expedition fitted out against Ireland and affected a descent upon Beerhaven in County Cork, previously to the landing of his chief, Earl Strongbow, in Leinster. Sir Michael is mentioned in the records of the Tower of London, as one of the leading captains in the enterprise; and in the reigns of Henry II. and Richard I. he was Lord, by tenure, of Beerhaven and Bantry. " 
"The Barons Trimleston, like the Viscounts Kingsland, descend from the De Bernevals of Brittany. Sir Christopher Barnewall of Crickstown, in the county of Meath, was Chief Justice of the King's Bench in Ireland in 1445-1446. After the subjection of Ireland in the time of Henry II, Michael de Berneval, who served under Strongbow, obtained large grants of land at Beerhaven, county Cork, of which the O'Sullivans had been dispossessed. Here the Bernevals flourished in great prosperity until the reign of John, when the Irish rose against them, and destroyed every member of the family but one, who happened to be in London learning the law. The latter, returning to Ireland, was settled at Drumnagh, near Dublin, where his posterity remained until the reign of James I. " 
Early History of the Byrnal family
This web page shows only a small excerpt of our Byrnal research. Another 72 words (5 lines of text) covering the years 1646, 1640, 1470, 1538, 1534, 1538, 1592, 1663, 1622, 1534, 1550, 1560, 1704, 1779, 1779, 1842, 1500, 1552, 1522, 1575, 1592 and 1663 are included under the topic Early Byrnal History in all our PDF Extended History products and printed products wherever possible.
Byrnal Spelling Variations
Church officials and medieval scribes spelled names as they sounded; therefore, single person, could have his name spelt many different ways during their lifetime. While investigating the origins of the name Byrnal, many spelling variations were encountered, including: Barnewall, Barnwall, Barnwill, Barnewill, Barnewell, Barnewelle, Barnwelle, Barnwell, Bernwell, Barneville and many more.
Early Notables of the Byrnal family (pre 1700)
Notable amongst the family up to this time was John Barnewall, 3rd Baron Trimleston (1470-1538), High Chancellor of Ireland; John Barnewall, 3rd Baron Trimlestown (1534-1538.)
Nicholas Barnewall, 1st Viscount Kingsland (1592-1663), who belonged to the family of Barnewall, or De Berneval. 
Sir Patrick Barnewall or Barnwall (d. 1622), was the eldest son of Sir Christopher Barnewall of Turvey, Gracedieu, and Fieldston, son of Sir Patrick, who in 1534...
Migration of the Byrnal family to Ireland
Some of the Byrnal family moved to Ireland, but this topic is not covered in this excerpt.
Migration of the Byrnal family
Ireland's Great Potato Famine left the country's inhabitants in extreme poverty and starvation. Many families left their homeland for North America for the promise of work, freedom and land ownership. Although the Irish were not free of economic and racial discrimination in North America, they did contribute greatly to the rapid development of bridges, canals, roads, and railways. Eventually, they would be accepted in other areas such as commerce, education, and the arts. An examination of immigration and passenger lists revealed many bearing the name Byrnal: Nicholas Barnwel who settled in Barbados in 1679; John arrived in Philadelphia, Pennsylvania, in 1798; Robert settled there in 1831; Thomas landed in New York state in 1823..
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: Malo mori quam foedari
Motto Translation: I would rather die than be disgraced.