A stakeholder is defined as the role of an individual, team, or organization (or classes thereof) that represents their interests in, or concerns relative to, the outcome of the architecture.
A stakeholder has one or more interests in, or concerns about, the organisation and its enterprise architecture.
The name of a stakeholder should preferably be a noun.
Motivation
CEO, the board of directors, shareholders, customers, business, and application architects
Composition, Aggregation, Specialisation