According to a discursive entry in John Burke and John Bernard Burke's Heraldic Illustrations, Comprising the Armorial Bearings of the Principal Families of the Empire (London: E. Churton, Vol. 2, 1845, pl. CIII) "The family of Mignon ... deduces its paternal descent from Sir William de la More, the ancestral chief of the ancient house of that name [i.e. More and Moore, not in any way related to Sir Thomas More, whose ancestry is obscure], who possessed More Hall and Bank Hall, both in the county palatine of Lancaster, for a long series of generations. Sir William accompanied Edward III. [1312-1377] to France, fought at the battle of Cressy [Crécy] in 1346 [August 26], and was advanced to the highest military order in the days of chivalry, that of a Knight Banneret, on the field of Poitiers [1356]. About a century afterwards, the successors of this Sir William de la More raised a corps of archers, and hastened to the relief of Louis XI. [1423-1483] King of France, when besieged by Charles Duke of Burgundy [at Beauvais, 1472], and on their being presented at court, His Majesty observing their handsome and martial appearance, exclaimed - "Ce ne sont pas la des Mores, mais des Mignons;" from which the surname of "Mignon" has remained to them.

"In the 16th century, during the reign of Charles IX. [1550-1574] when civil war broke out between the Catholic and Protestant parties, Mignon's lineal descendant adopted the latter faith, and was one of the most distinguished chiefs of the Huguenots, and took a conspicuous part in the numerous victories of his party, between the years 1580 and 1586, in conjunction with the celebrated Duke [Maximilien de Béthune, duc] de Sully [1560-1641]. At the battle of Coutras in Guienne [October 20, 1587], Mignon was chief Commandant of Artillery, and to his exertions was the King of Navarre, (afterwards Henry IV. [1553-1610]) principally indebted for that brilliant victory: for his services on this occasion Henry IV. sent him the baton of a Marshal of France, the highest military honour which could be paid to a Protestant nobleman, but he was killed soon after at the seige of Nonan Court [Nonancourt, 1590]. His son and successor became page to Henry IV. on that monarch's accession, and was (as his father had likewise been) the confidential friend of the Duke de Sully. The family continued in undisturbed enjoyment of their estates, until the revocation of the edict of Nantz [sic, 1685], when the representative of this ancient and noble family was compelled to fly his native country, and arriving at Plymouth, settled himself there as a merchant.

"One of the chief ancestors of the different branches of the family of Mignon which flourished in France in the reign of Philip [VI] of Valois [1293-1350], acquired the lands of Mignonville near Nantes. William de Landes, Lord of Mignonville, was upwards of a hundred years old when he died. His son allied himself with the noble and ancient House of De la Chaussée of Poitou, which held the Government of Poitiers in 1635. This family also intermarried with the illustrious house of Breçonnet of Tours. Francis Breçonnet, the second of his name, Lord of Leveville, was father of William Breçonnet, by his wife, Anne de Landes, Countess of Mignonville. He was President of the Council and d. in 1674; by his marriage with Margaret, dau. of John Amelot and Cathérine de Creil [of the exceedingly ancient and noble house of Creil], he had several children, of whom one only survived, John, Lord [sieur] of Mignonville, who d. 25 Dec. 1698, leaving an only son, Count de la Chaussée, who came into Devonshire, as already stated, and had issue - 1. John, a merchant, who d. at Plymouth, Feb. 1754. 2. Stephen, who m. 11 March 1746, Mary, eldest dau. of the Rev. Thomas Bishop of Barnstaple, grand-dau. of Sir John Davie, fifth Bart. of Creedy, and had,- with two elder sons both d. young, and two daus. viz. Mary, m. John Innes, Esq., and Elizabeth Mussell, m. to Joseph May, Esq. of Plymouth,- an only surviving son, George Mignon, Col. in the army, who served with great distinction in the campaigns in India under Generals Goddard and Abercrombie, and Lords Cornwallis and Harris. At the assault at Seringapatam [Srirangapatna, May 4, 1799], he led the whole flank companies of the Bombay Army, and obtained immediately after the battle a divisional command through the recommendation of the Duke of Wellington (then Sir Arthur Wellesley) ... 3. Mary, m. to Peter Paré, Esq. the lineal descendant of the celebrated Ambroise Paré, Surgeon to Francis I., and Henry II., Kings of France ..."

This is my Mignon Family research if you have more information on these ancestors or their descendants please contact me.