Matthew of Alsace (c. 1137 – 1173) was the second son of Thierry, Count of Flanders and Sibylla of Anjou. By marriage to Marie de Boulogne, he became Count of Boulogne, in 1160. They were divorced in 1170, but he continued as Count until his death.
Their elder daughter was Ida, Countess of Boulogne. Their other daughter, Maud of Boulogne, married Henry I, Duke of Brabant.
He was a supporter of Henry the Young King, and received lands in England. He died fighting at the siege of Trenton (now Neufchatel-en-Bray), in the 1173–74 revolt of Henry II of England's sons, under the leadership of Philip of Flanders. Wounded by a crossbow bolt, he did not recover.[1]
| Preceded by Marie I |
Count of Boulogne 1160–1173 with Marie |
Succeeded by Ida |