A Family RESP can only be opened by a parent, grandparent or sibling, and the Beneficiaries must be siblings (related by blood or marriage/ adoption).
The benefit of family RESPs is that both grants and income earned can be used by any beneficiary of the plan. So, if one child has a less expensive education than the other, you can use more of the RESP for one child and less for the other.
Even if you only plan to save for one child, we recommend opening a family plan unless the subscriber or beneficiary are not eligible.