This is a list of names in which the categories include top 10 in Japan - 1930s.
AikofJapanese From Japanese 愛 (ai) meaning "love, affection" and 子 (ko) meaning "child", as well as other character combinations.
HirokofJapanese From Japanese 寛 (hiro) meaning "tolerant, generous", 裕 (hiro) meaning "abundant" or 浩 (hiro) meaning "prosperous" combined with 子 (ko) meaning "child". Other kanji combinations are possible.
KazukofJapanese From Japanese 一 (kazu) meaning "one" or 和 (kazu) meaning "harmony, peace" combined with 子 (ko) meaning "child". This name can also be formed from other kanji combinations.