The following individual does not have a valid birth date and could not be added: King of Castile Milesius (I4301)
1773 BC - 1773 BC - 
King Henry I (1100 - 1135)
King Stephen (1135 - 1154)
Queen Matilda (1135 - 1141)
Queen Matilda (1141 - 1148) (disputed)
King Henry II (1154 - 1189)