Only Russians and Armenians received official stateless status and Nansen passports.

Evidence

30 Only the Russians, in every respect the aristocracy of the stateless people, and the Armenians, who were assimilated to the Russian status, were ever officially recognized as “stateless,” placed under the protection of the League of Nations’ Nansen Office, and given traveling papers. — Hannah Arendt, The Origins of Totalitarianism, 2516