On June 8, 1871, Peabody was married to Annie Putnam (1847–1911), the daughter of John Phelps Putnam, a Boston Aldermen, and Harriette (née Day) Putnam.
On June 8, 1871, Peabody was married to Annie Putnam, the daughter of John Phelps Putnam, a Boston city council member, and Harriette (née Day) Putnam.