Are you asking if you can combine them from different people's RR accounts? Not sure if that is your question.
Everyone in my family has a RR account. But I cannot combine my DS's RR credits and my DD credits together to earn a free ticket faster, if that is what you are asking. I have asked SW about this before and was told it was a "no". If you CAN, I'd love to know how!! We don't fly a lot, but I fly about once a year with one child or the other.... so they never get credits quickly enough for them to earn Rewards. But I can combine MY Rewards along with the RR I earn from the SWA Visa card I have (in my name).
Clear as mud??...................P