Last name Iod (Iod 
, Iode 
, Jód) , in all the world, is a rare cognomen. The surname Iod is habitual in Ireland, where it is a rare surname, France, where it is a very rare surname, and Italy. Not in comparison with a country's population, it most frequently occurs in France, Indonesia, and Italy. Likewise, Iod is the forename as well as the last name.