>>682
B6に
=IF(COUNTIF(B$1:B$5,"鈴木"),"○","")
B7に
=IF(COUNTIF(B$1:B$5,"佐藤"),"○","")
…
と入れていき、B6:B10の範囲を選択してフィルハンドルで右に伸ばせば簡単