"Blend of Juan and Carlos"
The name Juancarlos is commonly a male name from the "Spanish" origin.
Juancarlos joins the Spanish given names Juan and Carlos in one written form. Juan is the Spanish form of John and Carlos the Spanish form of Charles, so the compound carries the two names together rather than adding a separate meaning of its own. United States birth records enter it as a single word, while Spanish usage typically writes it as Juan Carlos.
The pronunciation of Juancarlos is wahn-KAR-lohs.