OSLJW

Hi all

I have a family trip coming up flying t/r osl-hel-sin. As we never fly AY or other OW carriers, neither of us have any notable mileage on OW. My question is then as follows:

Can i register my OW-account on all pax and then get the miles from all pax in my account? I have done so sucesfully on SK (*A), but i dont know AY very well. It would be great to accrue the miles on one acount, rather than having a smaller amount in 4 different cards that will never be used (And thus i won't bother registering them at all i suppose)

Any insight is greatly valued!