It also includes their grandchildren in cases where they were registered as Irish citizens in the Foreign Births Register held in every Irish diplomatic mission .
This includes Irish citizens who have emigrated abroad and their children , who are Irish citizens by descent under Irish law .
Irish also includes citizens ' grandchildren in cases where they were registered as Irish citizens in the Foreign Births Register held in every Irish diplomatic mission .
This includes Irish citizens who have emigrated abroad and their children , who are Irish citizens by descent under Irish law .