The following individual does not have a valid birth date and could not be added: Conall Gulban (I16139)
1100 BC - Yes, date unknown 1100 BC - Yes, date unknown
King Harthacnut (1040 - 1042)
King Edward The Confessor (1042 - 1066)
King Harold II (1066)
King William I The Conqueror (1066 - 1087)
King William II Rufus (1087 - 1100)