Juan Carlos is a name that is commonly used in Spanish-speaking countries. If you are looking for synonyms for this name, there are several options to choose from. Some variations include Juan, Carlos, Johan, and Karlos. Other similar names can include Diego, Manuel, Fernando, and Rafael. These names have different origins and meanings but can be used interchangeably to refer to someone whose given name is Juan Carlos. When choosing a synonym for this name, you may want to consider the cultural context and meaning behind the name, as each name can have a different connotation and significance.