Born in 1919 and raised in Boston, Massachusetts, Bundy was the third son in a prosperous family long involved in Republican politics. His older brothers were Harvey Hollister Bundy, Jr., and William Putnam Bundy, and he had two younger sisters, Harriet Lowell and Katharine Lawrence. His father, Harvey Hollister Bundy, from Grand Rapids, Michigan, was a prominent attorney in Boston serving as a clerk for Justice Oliver Wendell Holmes Jr. in his younger days. Bundy's mother, Katherine Lawrence Putnam, was related to several Boston Brahmin families listed in the Social Register, the Lowells, the Cabots, and the Lawrences; she was a niece to Harvard president Abbott Lawrence Lowell. Through his mother, Bundy grew up with the other Boston Brahmin families, and throughout his life he was well connected with American elites.