User blog comment:B214/DxD Zero: Sirzechs story/@comment-37165251-20181018214519/@comment-37165251-20181020214706

Ok it is confirmed that Tsufaame Tereaku Leviathan  is the Daughter of the Original Leviathan.

In the Part 3 Short Summary of DxD Zero is said:

" Ajuka says only Sirzechs can match him, but expected her to as well since she's Leviathan's daughter. "