Penn Frost
Penn was born before 1770.  He died after 1782 in Lattingtown, Long Island.

 Sarah Underhill
Sarah was born before 1770.  She died after 1782.

 Lanah Frost
Lanah was born on August 11th, 1782.  She died at the age of 92 on January 14th, 1875 in Glen Cove, Long Island, New York.