I've never heard of a profesional ice hockey league in Spain either, but I do know that ice hockey is played in quite a few places throughout Spain - basically wherever there is an indoor rink. There are leagues that play (my husband was captain of his team some 20 years ago), but it's not big. About 10 years ago we went to watch a group of foreigners, mostly Canadians (and some were former pros)play for the fun of it in an indoor rink in the western 'burbs of Madrid. So your nephew may be involved in one of the very few teams there. Sorry I can't give you more info. It's just not big in Spain.