Marcos Alonso joined an elite group of footballers on Tuesday when he made his debut for Spain as a late substitute in their 6-1 defeat of Argentina.
The Chelsea wing-back became just the seventh third-generation international footballer in the history of the game; that is, Alonso is directly descended from two other players to have represented La Roja.
Both Alonso's father and grandfather appeared for Spain during their playing careers, meaning the Chelsea man has ensured a fine family tradition continues.
But which other families have this tradition?