Hadar ta fito ne daga Larabci حضار (ma'anar tushen shine "kasancewa" ko "a ƙasa" ko "yanki, yankin wayewa"), yayin da sunan Agena na iya kasancewa daga Latin genua, ma'ana "gurguje". A shekara ta 2016, Ƙungiyar Astronomical ta Duniya ta shirya Ƙungiyar Aiki a kan Sunaye na Star (WGSN) don tsarawa da kuma daidaita sunayen sunaye ga taurari. WGSN ta amince da sunan Hadar don star β Centauri a ranar 21 ga Agusta 2016 kuma yanzu an shigar da shi a cikin Catalog of Star Names na IAU. Sunan Sinanci na tauraron shine 腹一马 yī (Mandarin: mǎ fù, "Tauraron Farko na Farko na Abdorong").
Ƙasar Genoa