kanjoneista
Kanjoneista is not a widely established concept in Finnish linguistics or geography. It appears to be a form that resembles Finnish morphology but does not correspond to a standard lexical item with a defined meaning. The common Finnish noun for canyon is kanjoni, and the standard elative plural meaning “from the canyons” is kanjoista. The spelling kanjoneista is atypical in ordinary language use and may occur as a misspelling or as a stylized name in some contexts.
If encountered as a proper noun, Kanjoneista could conceivably be used as the name of a project,
In ordinary writing, related terms you might encounter include kanjoni (canyon), kanjonivaellus or kanjonivaelluksesta (canyoneering or