Yes, but it's not quite the same thing as "all". Around 9% of the population (as of 2011) were not born on the island of Ireland. Of course, this does not pre

Yes, but it's not quite the same thing as "all". Around 9% of the population (as of 2011) were not born on the island of Ireland. Of course, this does not preclude them from having parents or grandparents who were, but certainly the number of Northern Ireland not eligible for Irish citizenship is not zero.