Dirk VI of Holland (c. 11145 August 1157), also known as
Dietrich in German,
Thierry in French, and
Theodoric in English, was
Count of Holland between 1121 and 1157, at first, during his minority, under the regency of his mother
Petronilla. He was the son of
Count Floris II. After his death he was succeeded by his eldest son
Floris III. He married Sofie of
Salm, Countess of Rheineck and
Bentheim. She was heiress of Bentheim, which she ruled together with her husband and which was inherited by the couple's second son Otto after his parents' death.