Aanḵáawu is the same word as aankháawu. Due to the underlined characters in Tlingit (x̱, ḵ, g̱) being relatively uncommon, kh is sometimes substituted for ḵ, gh for g̱, and xh for x̱. When copying and pasting from the Sealaska Heritage Dictionary, the ḵ sometimes gets mysteriously changed to ñ, thus aanñáawu from aanḵáawu.
It looks like the Tlingit approximations recorded by Rev. Sam Young Hall ("Nuknate Ankow ka Glate Ankow") would now be written in the modern orthography as «Nakwnéit Aanḵáawu ḵa Dleit Aanḵáawu.» «Nakwnéit» means "priest" and came to Tlingit through Chinook Jargon but originates from French «le prêtre» (several words in Tlingit and other Northwest Coast Indigenous languages were approximated from foreign languages through Chinook Jargon, e.g., Tlingit «gishóo» from French «cochon» "pig"). «Dleit» means "snow," but was translated as "ice" for some reason.