Last name Yldemar (Yldemar 
) , in the world, is a rare cognomen. The last name Yldemar is characteristic of Latin America and the Caribbean, particularly Venezuela, where it is a rare surname, and Argentina, where it is an extremely rare surname. Also, Yldemar is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yldemar | Peru, Colombia, Argentina, Venezuela, Brazil |