Family name ארסניו (Arsenio 
, ארסניו 
) , in all the world, is a common cognomen. The surname ארסניו is habitual in Spain, where it is quite a common surname, Nicaragua, where it is quite a rare surname, and Portugal. Measured by absolute frequency, this name is the most popular in Spain, Philippines, and Mexico. More frequently, ארסניו is the forename as well as the last name.