He joined the Department of Greek at Bryn Mawr College the following year, and married Alice Bockstahler, with whom he later had two sons, Steven and Alexander; Steven also became a classical scholar and professor at UCLA.
Njegov brat Owen Lattimore je bil sinolog, ki je bil v času preganjanja komunistov v ZDA, ki ga je izvajal John McCarthy, preganjan zaradi svoje domnevne povezave s Kitajsko.