Japan - emperor, India - ?

MAHARAJA
List of words for the clue Japan - emperor, India - ? 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 - ?
JAPANmaharaja - India, emperor - ?
RUSSIAemperor - Japan, tsar - ?
TRAJANRoman emperor
EMPERORIndia - maharaja, Japan - ?
HADRIANRoman emperor
PENGUINAdelie or emperor
PHARAOHJapan - emperor, Egypt - ?
AUGUSTUSRoman emperor
AURELIUSMarcus, Roman emperor
CALIGULARoman emperor
CLAUDIUSRoman emperor
COMMODUSRoman emperor
TIBERIUSRoman emperor
CARACALLARoman emperor
VESPASIANRoman emperor
DIOCLETIANRoman emperor
PHARAOHJapan - emperor, Egypt - ?
TSARJapan - emperor, Russia - ?