No.13078337 ViewReplyOriginalReport
It's confirmed, C.C. real name is "Yuki"

Episode 15 spoiler.

Turn 15- The World Of C「C の 世界」 , July 20th
In the middle of the battle with V.V., Lelouch is transferred to the mysterious World of C of the mystery. He has to fight with the enemy who has powers beyond all knowledge. When Lelouch is in a desperate situation, the one who shows up before him is a young C.C.

See, that episode is going to relate C.C. real past and give us her real name