His daughter Helen married Frank Nesmith Parsons, Pike's law partner from 1879 until his death; Parsons was later Chief Justice of the New Hampshire Supreme Court (1902–1924).
Helen, his daughter, married Frank Nesmith Parsons, who was Pike's business associate from 1879 to the end of his life. Parsons served as Chief Justice of the New Hampshire Supreme Court from 1902 to 1924.