Distant cousin
A relative shared through a remote common ancestor — kin you would have to explain.
A distant cousin in a dream is the dream's image of a relative whose connection to you would have to be explained on paper. The kinship is real but thin; the common ancestor is several generations back. The dream brings the distant cousin when a connection in your life — a long-lost contact, a thin professional thread, a person who turns out to share a friend you barely remember — is being activated for present purposes. A distant cousin met warmly is the dream telling you even thin connections can carry weight when honestly claimed. A distant cousin claiming more than the kinship supports is the dream noting that the thin thread is being asked to bear what it cannot.