Frelinghuysen
- Carl Frelinghuysen Gould
- Frederick Frelinghuysen (businessman)
- Frederick Frelinghuysen (general)
- Frederick Theodore Frelinghuysen
- Frelinghuysen Arboretum
- Frelinghuysen Township, New Jersey
- Frelinghuysen University
- General John Frelinghuysen House
- George Griswold Frelinghuysen
- Johann Anastasius Freylinghausen
- John Frederick Frelinghuysen
- John Frelinghuysen (minister)
- Joseph Sherman Frelinghuysen, Jr.
- Joseph Sherman Frelinghuysen, Sr.
- New Jersey
- Newark, New Jersey
- Peter Hood Ballantine Frelinghuysen II
- Piscataway, New Jersey
- Rodney Frelinghuysen
- Suzy Frelinghuysen
- Theodore Frelinghuysen
- Theodore Frelinghuysen Jewell
- Theodore Frelinghuysen Seward
- Theodore Frelinghuysen Singiser
- Theodorus Jacobus Frelinghuysen
- Theodorus Jacobus Frelinghuysen II
- Township (New Jersey)