Spanish teenager Marcos Alonso has signed a three- year contract with Bolton Wanderers, according to the Premier League club on Tuesday, dpa reported.
Alonso, 19, is an attacking left-back who played for Real Madrid's nursery team Castilla since 2008. He made his Liga debut in April as a late substitute in Real's win away to Racing Santander.
He is the latest product of a colourful Spanish footballing dynasty.
His father, also called Marcos, was left-winger for Atletico Madrid, Barcelona and Spain in the 1980s. His grandfather, Marquitos, was a skilful defender for Real Madrid in the 1950s, helping the whites to win the first five European Champions Cups