IF you have the HA Visa card, then anyone with HA miles can "pool miles" by transferring their miles to your account. There is a 10x per year limit on the number of transfer-ins.
But you can't "combine" points from friends'/family members' accounts, only via the "pool miles" option, above.
Aloha Airlines has an "Ohana Plan" where you can pull from various family member accounts to get award travel issued. Note, though, that you have to apply in writing and have signatures of all the family members and that AQ does nothing very quickly