This is the 2453rd most frequent Japanese word.
中山
"中山" (Nakayama) is a Japanese surname or place name meaning "central mountain."
Here, 中山 (Nakayama) is used as a surname, commonly found in Japan.
私は中山さんと一緒にランチを食べました。
I had lunch with Mr./Ms. Nakayama.
In this sentence, 中山 is used as the name of a place, a town known for its scenic views.
中山はとても美しい田舎町です。
Nakayama is a very beautiful rural town.
Here again, 中山 refers to a specific location, indicating a destination.