This is the 7011th most frequent Japanese word.
メアリー
"メアリー" is the Japanese phonetic rendering of the name "Mary."
In this sentence, 'メアリー' serves as the subject of the sentence, referring to a person's name.
メアリーは音楽が好きです。
Mary likes music.
Here, 'メアリー' represents the given name of the person being referred to in the sentence, preceded by 'という', which associates the name with the person mentioned.
私の友人にメアリーという人がいます。
I have a friend named Mary.
In this context, 'メアリー' is used as the noun (subject) in the sentence, and the following action describes her activities.