@episodic memories: I don't personally have any like that, but I hear many people do consider the subjective experience of pivotal events in their life as part of who they are.

@relationships: I'm talking the literal membership here, the thing that exists as a function of the entanglement between states in different brains.

To clarify, I'm not talking about "your identity" here as in the information about what you consider your identity, but rather the referent of that identity. To many people, their physical bodies are part of their identity in this sense. Even distant objects, or large organizations like nations, can be in extreme cases. Just because it's a trend here to only have information that resides in your own brain as part of your identity doesn't mean it's necessary, or even especially common in it's pre form in most places.