Hello Michel! Do you think there was a connection in these families, or simply the common name? I know there was also a castle "Montfort" in the Levant at the time of the Crusades. My relation to the name is from the Burg-Montfort in the Pfaltz region of Germany. The title came to the family Boos von Waldeck through marriage in the XV. century. My Grandmother was born "Boos zu Waldeck und Montfort".