Doi (surname)

Doi is an Indian surname. It is a subcaste or gurjar or gujjar caste. Doi (土井、土居、土肥) are three Japanese family names that are pronounced identically, with the first kanji of each pair of characters meaning "earth." Since they are the same phonetically, they are romanized identically: "do" for the first character and "i" for the second. Their identical pronunciation makes them function as the same surname in languages with writing systems that do not use some form of Chinese characters (for example, the Latin alphabet).

People with the surname

 * Hiroaki Doi (土井宏昭), Japanese hammer thrower
 * Ichitarō Doi (土居 市太郎), Japanese shogi player
 * Isami Doi (1903–1965), American artist
 * Kathryn Doi Todd (born 1942), American judge and mother of Mia Doi Todd
 * Kiyoshi Doi (土井 淳), Japanese baseball player
 * Koji Doi (土井 公二), Japanese mathematician, who introduced Doi–Naganuma lifting
 * Masao Doi (土井 正男), Japanese polymer scientist
 * Melissa Doi, American businesswoman and September 11 attack victim
 * Mia Doi Todd (born 1975), American musician and daughter of Kathryn Doi Todd
 * Mika Doi (土井 美加), Japanese voice actress
 * Misaki Doi (土居 美咲), Japanese professional tennis player
 * Miwako Doi (土井 美和子), Japanese electrical engineer
 * Naruki Doi (土井 成樹), Japanese professional wrestler
 * Ryosuke Doi (土井 陵輔), Japanese artistic gymnast
 * Ryuichi Doi (土肥 隆一), Japanese politician
 * Shingo Doi (土井 槙悟), Japanese speed skater
 * Shoma Doi (土居 聖真), Japanese footballer
 * Shuta Doi (土居 柊太), Japanese footballer
 * Takako Doi (土井 たか子), Japanese female politician
 * Takao Doi (土井 隆雄), Japanese astronaut
 * Takeo Doi (土井 武夫), Japanese aircraft designer
 * Takeo Doi (土居 健郎), Japanese psychoanalyst
 * Takero Doi (土居 丈朗), Japanese economist
 * Toshikatsu Doi (土井 利勝), Japanese daimyō
 * Toshitada Doi (土井 利忠), Compact Disc inventor
 * Yoichi Doi (土肥 洋一), Japanese footballer
 * Yoshihiro Doi (土肥 義弘), Japanese baseball player
 * Yukihiro Doi (土井 雪広), Japanese racing cyclist
 * Yuriko Doi, choreographer and stage director
 * Remi Anri Doi, Japanese handball player