Henry Frelinghuysen Jr. was an American politician and lawyer born on December 29, 1810, in New Jersey. He served as a member of the United States House of Representatives from 1863 to 1865, representing the Republican Party. Frelinghuysen was known for his commitment to issues such as civil rights and education during the post-Civil War era. In addition to his political career, Frelinghuysen was also involved in various civic activities and held several local offices. He was a member of the prominent Frelinghuysen family, which had a significant influence in New Jersey politics. He passed away on December 18, 1884.