People can claim Italian nationality based on ancestry on one side going back a number of generations, and then apply for a passport.
Virtually all people in Poland claim Polish nationality, with Polish as their native tongue.
Under a recent law, people with a parent born in Mexico can claim Mexican nationality.
Point of fact she could actually claim Spanish nationality if she wanted, having been born in (technically) Spain, i.e. Gibraltar.
Engalycheva and her family moved to Russia in January 2012, where they claimed Russian nationality.
The term has also been applied to those with no ancestral connection to Ireland or who claim Irish identity or nationality.
I imagine that he claims any name and nationality that happens to suit him.
There were also Jews of Baghdadi origin who claimed British nationality through family connections in India.
In the Soviet Union, the 1989 census numbered roughly two million people who claimed German nationality.
The others are thought to be of Syrian, Tunisian and Algerian origin, though many had papers claiming Spanish nationality.