Just to add another example - my KK Boar is Brucklay Te Whangi (the Brucklay bit refers to where he was born & Te Whangi is the bloodline) my KK sow is Tillykiera Awakino. My farm is Yonderton, so boar piglets born here are called Yonderton Te Whangi 1,2,3,4,etc etc etc and gilt piglets are Yonderton Awakino.
I don't know that any one bloodline is better than another when it comes to meeting breed standards - you get good piglets and not so good (in terms of meeting breed standard) from every litter. Only the one's who meet breed standard would be registered, although everything else is still pedigree and birth notified.
I know some people who breed and advocate very close breeding (is it called line breeding ?) where daughters can be mated with fathers, in this scenario you get the very best of the breed, but also run the risk of getting the worst and having deformed piglets which have to be culled. Personally I choose not to do this and look to add another bloodline into the mix (just to REALLY confuse matters !)
Hope you're not totally confused now ? It makes more sense when you've a pedigree certificate in front of you !
Karen x