This is the 7530th most frequent Japanese word.
内山
"内山" (Uchiyama) is a Japanese surname meaning "inner mountain."
Here, '内山' is used as a surname associated with an honorific 'さん', indicating respect.
内山さんは昨日の会議に出席しました。
Mr./Ms. Uchiyama attended yesterday's meeting.
'内山' in this context refers to a location—perhaps a mountain or area named Uchiyama.
内山の眺望は非常に美しいです。
The view from Uchiyama is extremely beautiful.
In this case, '内山' refers to a person's name and is used without any honorifics, implying familiarity or casual speech.