Cognomen Эрсилия (Ersilia 
, Эрсилия 
, Ersilija 
) , in all the world, is a rare surname. The last name Эрсилия is habitual in Nicaragua, where it is a rare surname, Honduras, and Greece. Measured by absolute frequency, this name is the most popular in Mexico, Spain, and Venezuela. More prevalently, Эрсилия is the forename as well as the last name.