Tantoo isn’t an Alaskan name and neither is Cheeon. Illanaq, however, appears to be Yupiq.
Tantoo is a variant of Tonto, from Spanish tonto (“fool”), from Western Apache kounʼnde (“wild rough people”).
The stage name of
Rose Marie "Tantoo" Cardinal (1950-), a Canadian actress of
Métis descent, who chose it because Tonto Cardinal was already being used in the Screen Actors Guild. So, technically it’s not a Native American name it’s a stage name chosen by a Native American.
I’m currently researching Illanaq for you amongst my Yupiq and other Alaskan native friends.