Whitebrand is a term used to describe a type of Ethernet switch that is a whitebox or generic manufacture but sold by a known IT brand. Juniper OCX1100, HP Open Network Switches are example.
White-Box Switching + Vendor Branding = Whitebrand switching.
The other term used is “britebox” but this sounds like dishwashing liquid or something you buy form the local two dollar store. Andrew Lerner at Gartner promoted the term in Branded Switching + White-Box Switching = Brite-Box Switching. Networking is a technology of style and taste, we should do better than that.
Whitebox switches Merchant Silicon internally but the overall chassis design is standard. The most common standard today is the Open Compute Project as promoted by Facebook engineering team and now an open project that is specifying a generic design for Ethernet switching products.