All around the world, Ylsa (Ylsa 
) is a rare feminine first name. The given name Ylsa is habitual in Latin America and the Caribbean, particularly the Dominican Republic, where it is a rare girly name, Bolivia, and Argentina. Measured by absolute frequency, it is the most numerous in Latin America and the Caribbean, particularly Argentina, the Dominican Republic, and Mexico. Very seldom, Ylsa is the last name as well as the forename.