Japan - emperor, Egypt - ?

PHARAOH
List of words for the clue Japan - emperor, Egypt - ? from the crossword:
NERO OTHO OTTOI TITUS OTTO TSAR TRAJAN NEROS RULER OTTOIV OTTOII SHAH NAPOLEON KAISER CZAR PEDRO OTHOI INCA CAESAR AUGUSTUS
WordClue
NERORoman emperor
TSARJapan - emperor, Russia - ?
EGYPTemperor - Japan, pharaoh - ?
INDIAemperor - Japan, maharaja - ?
JAPANpharaoh - Egypt, emperor - ?
RUSSIAemperor - Japan, tsar - ?
TRAJANRoman emperor
EMPEROREgypt - pharaoh, Japan - ?
HADRIANRoman emperor
PENGUINAdelie or emperor
AUGUSTUSRoman emperor
AURELIUSMarcus, Roman emperor
CALIGULARoman emperor
CLAUDIUSRoman emperor
COMMODUSRoman emperor
MAHARAJAJapan - emperor, India - ?
TIBERIUSRoman emperor
CARACALLARoman emperor
VESPASIANRoman emperor
DIOCLETIANRoman emperor
MAPLEJapan - cherry, Canada - ?
MAHARAJAJapan - emperor, India - ?