=== House of Saxe-Coburg and Gotha ===
Nevers came under the rule of the Count of Flanders in the 14th century, and from there, into the possessions of Philip the Bold, Duke of Burgundy, briefly reuniting the two lands.
In the Black Adder, Richard IV's Queen is Gertrude of Flanders; from 1482 to 1506, the County of Flanders was in fact ruled by Philip the Handsome, Count of Flanders.
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After Manasses' death late in 1139 de Vere traveled to Guînes, did homage to Thierry, Count of Flanders, and was made Count of Guînes by right of his wife.
The first counts of Rethel ruled independently, before the county passed first to the Counts of Nevers, then to the Counts of Flanders, and finally to the Dukes of Burgundy.
In 1385, at the Burgundian double wedding in Cambrai, she married John, Count of Nevers, the son and heir of Philip the Bold, Duke of Burgundy and Margaret of Dampierre, Countess of Flanders, Artois and Burgundy; at the same time her brother, William II, Duke of Bavaria married their daughter Margaret of Burgundy, Duchess of Bavaria.
In 1357, by marrying the future Countess Margaret III of Flanders, then heiress of Flanders, he was promised the counties of Flanders, Nevers, Rethel, and Antwerp, and the duchies of Brabant, and Limburg.
King Albert II decided in 2001 to no longer award courtesy titles such as Count of Flanders, Count of Hainaut and Prince of Liège.
William III (1224 – 6 June 1251) was the lord of Dampierre from 1231 and count of Flanders from 1247 until his death.
Her father was a patrilineal descendant of King Louis VI of France, her paternal grandmother Marie de Bourbon was a cousin of Guy of Dampierre, Count of Flanders, while her mother Beatrice was the only child of Count John I of Montfort-l'Amaury and his wife Jeanne, Dame de Chateaudun.
See also : William Clito (1102-1128), the son of Robert Curthose, Duke of Normandy, by his marriage with Sibylla of Conversano and count of Flanders.
Gertrude of Flanders, Countess of Savoy (1112–1186), daughter of Thierry, Count of Flanders
Gertrude of Flanders, Duchess of Lorraine (d. 1115/26), daughter of Robert I, Count of Flanders
On May 15, 1388 he was appointed captain of the castle of Calais and in 1390 he negotiated a truce with king of France, count of Flanders and the cities of Ghent, Bruges and Ypres.