Call member services.
Unless he's on the account my guess is no, not without you as he'd have no way to prove he's part of a
DVC family. Work around: I believe you can purchase it online through the member site - you'll be mailed a voucher and he can redeem that for his pass. Someone correct me if I'm wrong.
The problem you might run into is I'm not sure how fast Disney ships those vouchers out. Spring break is approaching fast. Another work around: I believe might also be possible to have the vouchers available for pickup... but that usually requires the purchaser's ID / credit card with most companies.