Aridai

Aridai was a son of Haman, the enemy of the Jews, killed on the day the Jews defended themselves throughout the Persian empire.

Son of Haman, Killed at Susa

Aridai appears by name in the list of Haman's ten sons slain at Susa. Es 9:9 records: "and Parmashta, and Arisai, and Aridai, and Vaizatha," as part of the enumeration running from Es 9:7 through Es 9:10: "the ten sons of Haman the son of Hammedatha, the Jews' enemy, they slew; but on the spoil they didn't lay their hand." Aridai is the ninth son named. His death on the thirteenth of Adar is part of the same event that established the feast of Purim.