Every @name mention in your space produces an identity record for that Identity on the page where it is mentioned. Identities are names, not pages: there is never a page behind one, and an at-mention is recorded as a relation with kind: "at-mention" and toTag: "identity".
ref: the name's namespaced @name identifier, the same value at-mention relations use as to.name: the name as written, without the @.page: the page the name is mentioned on.Example query, listing every name mentioned in this space:
${queryfrom index.objects("identity") select {name=name, page=page}}