Hainaut (Dutch: Henegouwen) is the westernmost province of Wallonia.
Baldwin V of Hainaut (1150-December 17, 1195) was count of Hainaut (1120?_1195), count of Flanders as Baldwin VIII (1191-1195) and margrave of Namur as Baldwin I (1189-1195).
Margaret II of Flanders (1202-1278) was countess of Flanders from 1244 to 1278 and countess of Hainaut from 1244 to 1246.
The virtually independent county of Hainaut emerged from chaotic conditions at the end of the 9th century as a semi-independent state, at first a vassal of the crown of Lotharingia.
The counts of Hainaut have had an historical connection to the counts of Flanders and Holland, to whom they had strong family ties.
With the murder of Jacqueline of Hainaut and Holland in 1436, her estates were acquired by Philip the Good, Duke of Burgundy.