Abraham op den Graeff

Abraham Isaacs op den Graeff, also Op den Graff, Opdengraef as well as Op den Gräff (c. 1649 – c. 1731) was one of the so-called Original 13, the first closed group of German emigrants to North America, and an original founder of Germantown, Pennsylvania, as well as a civic leader, member of the Pennsylvania Provincial Assembly, award-winning weaver, and as an early abolitionist signer of the first organized religious protest against slavery in colonial America. He, or his brother Derick op den Graeff, are briefly mentioned in John Greenleaf Whittier's poem "The Pennsylvania Pilgrim" simply as "Op Den Graaf".