Keiko (恵子) combines the Japanese kei (blessing, grace) and ko (child) — meaning "blessed child." Also written 慶子 (celebrating child) or 敬子 (respectful child). One of the most traditional Japanese feminine names.
Keiko Fukuda (1913-2013) was the highest-ranked female judoka in history (10th dan).
Keiko reduces to five — the number of Japanese blessing.