Biography (Wikipedia)
Biography (Rutgers University)
Biography (McClintock and Strong Cyclopedia)
Historical marker for Frelinghuysen Hall at Rutgers University, New Brunswick, New Jersey.
A centopah at t Elm Ridge Cemetery, North Brunswick, New Jersey memorializes where Theodorus Jacobus Frelinghuysen is buried.
Letter dated April 22, 1725 (1725, 1902)
Sermons of Theodorus Jacobus Frelinghuysen (1856)
Theodorus Jacobus Frelinghuysen (1869)