Esther 1:2

Ahasuerus : king of Persia after Darius

Susa : capital city of Elam and winter home of the Persian kings (OS)
(32° 11´, 48° 15´)

Esther 2:21

Ahasuerus : king of Persia after Darius

Bigthan : a man who was palace guard for King Ahasuerus

Mordecai : a leader among those who returned from exile with Zerubbabel,son of Jair of Benjamin; cousin and guardian of Queen Esther

Teresh : a gate keeper of the palace of King Ahasuerus