FROM INFORMATION COMPILED BY JOSEPH ARTHUR COSSAIRT. IT IS ON MICROFILM IN THE LDS FAMILY HISTORY LIBRARY IN SALT LAKE CITY # 0517002 ITEM 2. THIS MATERIAL WAS PROBABLY WRITTEN IN THE EARLY 1930'S

COSSART OF NOBLESSE

The most important family being that of COSSART de Espies of Picardy and the French Vexin which descended from Jehan de COSSART who is said to have come in 1480 from Liege in Belgium, to enroll himself in one of the military companies made up of men of noble birth, which Charles VII( the Victorious, 1403- 1461, King of France, who reconquered the territory captured by England) raised in 1447. It is asserted that there is no documentary proof that he was a native of Liege and of the same family as the Knight called Valthier de COSSART (Coslart) who during the first two decades of the 14th century made various grants to the Monastery of St Trou near Liege. There was a de COSSART d' Espies of Liege as early as 1308.

About 1456 Valthier de Cossart married Catherine De Villepoix, daughter of Colart De Villepoix and widow of Raoul de Seyecourt. After their marriage she inherited from her father and sister great amounts of landed properties in Picardy, as well as the estates of Landemont, Fontaine, Lavagent, Beauefresne, and La Veneur in Normandy. The only child of this marriage mentioned is Francois de Cossart, Captaine des villes Chateaux de Ham et de Perrone who is said to have the name of Espies to that of Cossart upon his marriage in 1490 with Rose Le Bourscher, dame of Espies, a feudal manor near Annery which is less than a mile from Pentoise in French Vexin. A second Cossart de Espies family resided at Annery and styled themselves as seigniors of that place and Espies and it seems they must have come from a common progenitor.

COSSART COATS OF ARMS

COSSART OF FRANCE

A silver shield or background. Two demi-lions in black, naissant rising or coming out of. The embattlement or Crenelle is of red with green portholes. Represents the battlements of towers, churches, and houses; one of the lines of partition.

COSSART d' Espies

A red shield or background, with golden cross with black anchors.

COSSART of Normandy

A silver shield or background. Two stemmed and leaved pears, an azure or blue chevron, a Moores head in black. The chevron is supposed to have been adopted from the bow of a war saddle which rises high in the front. The Moores head the heraldic term for the head of an african american man, in profile, cropped at the neck, wreathed about the temples. It is believed that this branch of the family helped expel the "Moors" from the continent.

COSSART of Amsterdam Holland

Green shield or background, a moving sun, unicorn and three lilies all of gold. The moving sun of gold is represented wit a human face environed in rays, it is termed the sun in splendor, or full glory. The unicorn in gold a beautiful superstitious animal with a long twisted horn out of the forehead, head and body like a horse, cloven hoof, hair under the chin like a goat, tail like a lion, And bay in color, unless otherwise described. The Fleur-de lies are of gold the flower of the lily. The heraldic lily differs from that of the garden having three leaves instead of five and here indicates the ascendancy branch of the family which is that of the sixth son.
It appears as if there were four distinct branches of the COSSART family living in Europe at one time.

I can't find a direct connection to any Cossart prior to 1595, but is is apparent that there Cossarts in France from which the Cossarts of Belgium descended.

Hope this helps.