Queen Ioanna of Greco-Turkey

Princess Ioanna of Greco-Turkey (born 1966) is the eldest daughter of King Constantine of Greco-Turkey and the third child of Princess Antonia of Europa. She is the heir to the throne of Greco-Turkey and 24th in line to the throne of Europa. She married Eric Mehmed Ziyaeddin (a descendant of Ottoman Sultan Mehmed V) and had three children: Prince Paul of Greco-Turkey (1991), Princess Katerina of Greco-Turkey (1994), Prince Michael of Greco-Turkey (1996).