Theodorus Jacobus Frelinghuysen (c. 1691 – c. 1747) was a Dutch-American Dutch Reformed minister, theologian and the progenitor of the Frelinghuysen family in the United States of America. Frelinghuysen is most remembered for his religious contributions in the Raritan Valley during the beginnings of the First Great Awakening. Several of his descendants became influential theologians and politicians throughout American history.