Kira is the Russian feminine of Cyrus — from the Greek Kyros, meaning "lord" or possibly from the Persian word for "sun." In Japanese, 煌 (kira) means "sparkle" or "glitter."
Kira entered the U.S. top 1000 in 1981 and has been continuously used. The character Kira in The Dark Crystal and Kira Nerys in Star Trek: Deep Space Nine are notable bearers.
Kira reduces to four — the number of solar command.