[2] He was described in his obituary as a lifelong friend of fellow Maine Republican Party founder Hannibal Hamlin.
[1] Benjamin's eldest brother, Samuel Eastman also served in the Maine House of Representatives and Senate.
[1] Samuel had several notable children, including Ben C. Eastman, who served two terms in the U.S. House of Representatives.
[9] Benjamin's younger brother Philip A. Eastman also served in the Maine House of Representatives and Senate.
Later in life, Benjamin Eastman moved to Portland, Maine, to live with his daughter, Eliza Spaulding.