Family name Hoii (Хойи 
, Hoii 
) , worldwide, is a very rare surname. The last name Hoii is habitual in Malaysia, where it is a rare surname, Netherlands, where it is a very rare surname, and Thailand, where it is an extremely rare surname. In absolute terms, the name is most common in Malaysia, China, and Netherlands. Also, Hoii is the forename as well as the last name.