Surname トア (Toa 
, Thore 
, トア ) , all over the world, is a common cognomen. The surname トア is characteristic of Vanuatu, where it is a common surname, Norway, where it is quite a rare surname, and Papua New Guinea. Measured by absolute frequency, the name is most common in India, France, and Indonesia. Very seldom, トア is the forename as well as the last name.