This is the 9502nd most frequent Japanese word.
紀夫
"紀夫" is a Japanese male given name, typically meaning "chronicle man" or "man of history."
紀夫 is used as a proper noun here, referring to a person named 'Ki'o', with a respectful honorific 'さん'.
紀夫さんは会社で働いています。
Mr. Ki'o is working at a company.
紀夫 is utilized as a given name in this sentence, identifying a friend's name.
私の友人の名前は紀夫です。
My friend's name is Ki'o.
紀夫 is employed as a direct address term, wherein the name 'Ki'o' is used to directly speak to or refer to the individual.