Suffix N.O.P

Does anyone know what N.O.P means after a name? I see it a lot with KWPN names, e.g. Jerich Parsival N.O.P. Thanks

AFAIK it means the horse was bought for the Dutch Olympic team. They use that to keep top horses in-country and not sold away.

example:
http://www.vdlstud.com/nieuwsitem/2615/05/2014/vdl-zirocco-blue-nop.htm