A “brand” is both tangible and intangible. It is tangible because it is a conditional space and time promise: I promise to do X for you, in time Y, conditional on prerequisite Z. It is intangible because it is an intention outside space and time: I intend for quality X to be available now and evermore.
A personal brand represents a person, a human being, with a limited lifespan. An organizational brand represents a “fictitious” person, a corporate or cultural institution, with a potentially unlimited lifespan in societal or historical terms.
Can an individual have both a personal and organizational brand? Examples: Heinz; Teresa; Mary; Buddha and so on. While individuals associated with these brands passed away as human beings, their promises (finite) and intentions (infinite) persevere to this day.