wiley i dont think that matters any more, coz say for example peter van den merwe buys a pigeon from gaby vandenabeele that pigeon automaticly is called a peter van den merwe, not a vandenabeele.
but i no what u mean and i would say, if u buy stock in then there children win thats when i belive that your family starts from the children of your stock then if they go on to produce even better pigeons then u can start calling it your family of birds.