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In page Kujula Kadphises:

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The connection of Kujula with other Kushan rulers is described in the Rabatak inscription, discovered in Rbatak, Afghanistan some years ago, which was written by Kanishka. Kanishka makes the list of the kings who ruled up to his time: Kujula Kadphises as his great-grandfather, Vima Taktu as his grandfather, Vima Kadphises as his father, and himself Kanishka: