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Around the globe, ケイカ (ケイカ ) is an extremely rare unknown gender forename. Much more frequently, ケイカ is the last name as well as the forename.
Keika, and 桂華
ヤン, ネモト, カトリ, サトウ, キクチ, クロキ, ハマダ, チョウ, イシヤマ, ナカムラ, and ヤマモト