Surname Phiala (Phial 
, Phiala 
, Fiole 
) , in all the world, is a rare cognomen. The last name Phiala is habitual in Netherlands, where it is a rare surname, Switzerland, and Colombia. Measured by absolute frequency, it is commonest in France, Colombia, and Mexico. Much less frequently, Phiala is the forename as well as the last name.