This is the 2575th most frequent Japanese word.
小野寺
"小野寺" (Onodera) is a Japanese surname.
In this sentence, "小野寺さん" functions as a proper noun referring to a person with the surname Onodera, and "さん" is an honorific suffix.
小野寺さんは親切な人ですね。
Ms. Onodera is a kind person, isn't she?
Here, "小野寺" refers to the name of a temple, illustrating its use as a place name.
小野寺というお寺を訪ねてみました。
I visited a temple called Onodera.
In this case, "小野寺" translates to "small temple" rather than a name, highlighting its descriptive nature.