This is the 7378th most frequent Japanese word.
令子
"令子" is a Japanese female given name meaning "Rei (auspicious or orderly) child."
Here, '令子' is a proper noun referring to a female name, commonly used in Japan.
令子さんは学生です。
Ms. Reiko is a student.
In this sentence, '令子' is being presented as a name, referring to the aesthetic or cultural appreciation of the name itself.
令子という名前は美しいですね。
The name 'Reiko' is beautiful, isn't it?
'令子' is a proper noun referring to a person being the object of the action performed by the subject (the mother) in the sentence.