This is a list of names in which the usage is Japanese; and the meaning contains the keywords happy or joy.
Etsuko 悦子, えつこ f JapaneseFrom Japanese
悦 (etsu) meaning "joy, pleased" and
子 (ko) meaning "child", as well as other kanji combinations.
Kiyo 清, 喜代, きよ f JapaneseFrom Japanese
清 (kiyo) meaning "clear, pure, clean" or other homophonic words. This was a popular name in the Edo period and remained common until the early 20th century, at which time it was usually spelled using katakana.
Yoshiko 良子, 芳子, 悦子, よしこ f JapaneseFrom Japanese
良 (yoshi) meaning "good, virtuous, respectable",
芳 (yoshi) meaning "fragrant, virtuous, beautiful" or
悦 (yoshi) meaning "joy, pleased" combined with
子 (ko) meaning "child". This name can be formed from other kanji combinations as well.
Yukiko 幸子, 雪子, 由喜子, 由貴子, ゆきこ f JapaneseFrom Japanese
幸 (yuki) meaning "happiness" or
雪 (yuki) meaning "snow" combined with
子 (ko) meaning "child". Alternatively, it can come from
由 (yu) meaning "reason, cause" with
喜 (ki) meaning "joy" or
貴 (ki) meaning "valuable" combined with
子 (ko) meaning "child". Other kanji combinations can also form this name.