Jus Sanguinis

Jus sanguinis, Latin for 'right of blood', is the principle by which citizenship or nationality is determined by the citizenship of one or both parents, regardless of the country of birth. It is the dominant basis for citizenship in most European, Asian, and Middle Eastern nations. Many countries impose generational limits, meaning citizenship can only be passed down one or two generations to descendants born abroad. This principle underlies most citizenship-by-descent programmes.