The general populace of Earth were unaware of his existence.
Place of Birth
Unknown planet within the Shi’ar Empire
Uncanny X-Men #484 (2007)
During his reign as majestor, D’Ken went insane and Lilandra took over as majestrix of the Shi’ar. Ka’ardum challenged her reign countless of times, leading Shi’ar military forces against her, so that he could capture the throne and return the Shi’ar to a state of glory once more. However, his plan failed and many believed him to be dead, but the truth was that Lilandra had him imprisoned on the asteroid Archipelago, where he remained hidden for many years.Later when her brother D’Ken, regained his mental faculties, Lilandra persuaded Corsair of the Starjammers to assist her in unleashing Ka’ardum from his asteroid prison. Their mission was accomplished with the assistance of the X-Men and Korvus of the Shi’ar. Ka’ardum agreed to assist Lilandra as an act of repentance to restore his honor.