Answer
The answer is Sandoval. Sandoval is the maiden name of Charles Aránguiz's mother. Aránguiz is a Chilean professional footballer who plays as a central midfielder for Brazilian club Internacional and the Chile national team. Born in Puente Alto, Chile, Aránguiz began his career with Universidad de Chile before moving to Brazil to play for Internacional. He has also played for Colo-Colo and Bayer Leverkusen.