These three phrases describe different ways

A feeder structure uses one or more “feeder funds” that collect capital from investors in specific segments (e.g., onshore vs offshore, tax profiles, currencies) and then invest substantially all assets into a common “master” fund.
This allows a manager to run a single master portfolio while offering different wrappers for different investor types or jurisdictions, often optimizing tax and regulatory treatment.

Co-branded advisory is where two firms appear together in the client-facing proposition (e.g., “Firm A x Firm B”), sharing logos and brand presence while jointly delivering advice or investment solutions.
In this model, the originating firm usually retains the primary client relationship, while the partner contributes capabilities (investment management, planning, tech) that are visibly associated with both brands.

A white-label family office layer is a turnkey platform (technology, investment engine, sometimes operations and research) provided by one firm but delivered under another firm’s brand, so end-clients experience it as that firm’s own family office offering.
The provider runs the underlying systems, product architecture and often portfolio processes, while the front firm controls branding, client ownership and often local regulatory licensing, effectively “renting” institutional-grade family office capability.