Around the world, Kosai (Kosai
, Косай
, โกศัย
) is a common primarily masculine, but very infrequently girly first name. The first name Kosai is characteristic of Japan, where it is quite a common boy's name, Kazakhstan, where it is quite a rare masculine name, and Azerbaijan. Measured by absolute frequency, it most frequently occurs in Japan, India, and Algeria. Very seldom, Kosai is the last name as well as the forename.
Sai, Panagi, Ghanem, Tanaka, Onishi, Uchida, Sangsui, Shamoon, Sinderi, Abohala, Bousbii, Gemmeli, Gemmela, Teppawong, Teppavong, Nishino, Hayashi, Vantala, Estowani, Yamamoto, Kobayashi, Dejrungrueang, Khauli, Takahashi, Sbihat, Sasaki, Ali, Lay, Ono, Sato, Amri, Marri, Majid, Santa, Saleh, Saito, Ahmad, Baker, Korra, Killo, Pangi, Pairo, Jujoas, Nasri, Ezzat, Faris, Zoabi, Suzuki, and Tantipalapol