Surname Hialmar (Hialmar 
) , in all the world, is a very rare last name. The last name Hialmar is habitual in Latin America and the Caribbean, particularly Venezuela, where it is a rare surname, Honduras, where it is a very rare surname, and Nicaragua. Measured by absolute frequency, it is the most numerous in Latin America and the Caribbean, particularly Venezuela, Mexico, and Honduras. Likewise, Hialmar is the forename as well as the last name.