Quick answer
Kiyoko is a girl name.
Meaning and history
From Japanese 清 ( kiyo ) meaning "clear, pure, clean" or 聖 ( kiyo ) meaning "holy" and 子 ( ko ) meaning "child". This name can also be formed from other combinations of kanji characters.
Notes and context
Usage: japanese | Japanese Hiragana: きよこ; Japanese Katakana: キヨコ