Terrygilliam is named after American-born filmmaker and animator Terry Gilliam.
Gramchapman is named after the comic actor Graham Chapman; it is the first in a series of six asteroids carrying the names of members of the Monty Python comedy troupe, the others being 9618 Johncleese, 9619 Terrygilliam, 9620 Ericidle, 9621 Michaelpalin and 9622 Terryjones.