toponym

[ top-uh-nim ]
/ ˈtɒp ə nɪm /

noun

a place name.
a name derived from the name of a place.

Origin of toponym

1890–95; top- + -onym, or by back formation from toponomy

British Dictionary definitions for toponym

toponym
/ (ˈtɒpənɪm) /

noun

the name of a place
any name derived from a place name