Daniel Lothrop (1831–1892 ) was born in Rochester, New Hampshire. Initially, he worked with his brother James in a drugstore. In 1850, he bought stock of a bookseller in Dover, N.H. and sold the items in his drugstore. After spending time in the Midwest he moved back east and in 1868 opened a publishing house and bookstore at 38 and 40 Cornhill, Boston. He made it a rule to publish books for true and steadfast growth in right living. In 1875, he moved to Franklin and Hawley Street as D. Lothrop & Co. In 1887, the company became D. Lothrop Company, a corporation. He soon moved the business to 364 and 366 Washington Street while the manufacturing and wholesale departments were at 118 and 120 Purchase Street.
- Father – Daniel Lothrop, the elder. Served in the State Legislature.
- Mother – Sophia Horne Lothrop.
- 1st Wife – Ellen J. Morrill.
- 2nd Wife – Harriett Mulford Stone (pen name Margaret Sidney) Wrote The Five Little Peppers.
- Brother – James.
- Brother – John.
Publications of D. Lothrop:
- Wide Awake.
- Our Little Men and Women.
- Chautauqua Young Folks' Journal.
- Best Things.