This is the 8011th most frequent Japanese word.
奈津子
"奈津子" (Natsuko) is a Japanese feminine given name meaning "summer child" or "summer girl," depending on the kanji interpretation.
Here, '奈津子さん' is used as a proper name to address an individual politely with the honorific suffix 'さん'.
奈津子さんは学校の先生です。
Ms. Natsuko is a school teacher.
In this sentence, '奈津子' is used as a possessive noun, indicating ownership of the word '話' (story).
奈津子の話は面白いですね。
Natsuko's story is interesting, isn't it?
Here, '奈津子' is mentioned as the name itself, within a general context of appreciation for it.