Quick answer
Momoko is a girl name.
Meaning and history
From Japanese 百 ( momo ) meaning "hundred" or 桃 ( momo ) meaning "peach" combined with 子 ( ko ) meaning "child". This name can be constructed from other kanji combinations as well.
Notes and context
Usage: japanese | Japanese Hiragana: ももこ; Japanese Katakana: モモコ