Ethnizens are the opposite of denizens.

They are external quasi-citizens who are neither citizens nor residents of the country granting that status.

It is generally granted to minorities on the basis of ethnic descent and perceived common ethnicity with an external country.

Germany is one of the countries granting citizens of other countries automatic naturalization based on ethnic descent while these persons still reside abroad. 

It is a status of residential quasi-citizenship combined with external formal citizenship granted by the sending country.