There are at least two artists using the name Don Carlos:
1) Italian deep house producer and DJ Carlo Troja
2) Jamaican reggae singer and composer
1) Carlo Troja aka Don Carlos hails from Varese, in the North of Italy, and is active as a DJ from the late 70's.
He debuted as a producer towards the end of the 80's with the single 'Alone' on Calypso Records (Irma), which became one of the cult tracks of the international Deep House scene. His productions have always mixed House rhythms with afro-american jazz sounds
Read more on Last.fm