what is the history behind this first mentioned name?
The name is derived from the Algonkian-language exonym "Kirištino.
Name
The name "Cree" is derived from the Algonkian-language exonym "Kirištino˙", which the Ojibwa used for tribes around Hudson Bay. 
what is parnassius smintheus? It is a high-altitude butterfly found in the Rocky Mountains. where did this mountain take its name from? It is a translation of the Cree name ' is given as, "When seen from across the prairies, they looked like a rocky mass".
The Cree are one of the largest groups of First Nations in North America and in Canada, over 350,000 people are Cree or have Cree ancestry. The Cree are one of the largest groups of First Nations in North America. As hunter-gatherers, the basic unit of organization for Cree peoples was the "lodge", a group of perhaps eight or a dozen people, usually the families of two separate but related married couples, who lived together in the same wigwam.
Cree Cree Cree
Introduction Introduction Historical
The Cree (, , etc.; ) are one of the largest groups of First Nations in North America.

In Canada, over 350,000 people are Cree or have Cree ancestry. The Cree (, , etc.; ) are one of the largest groups of First Nations in North America. As hunter-gatherers, the basic unit of organization for Cree peoples was the "lodge", a group of perhaps eight or a dozen people, usually the families of two separate but related married couples, who lived together in the same wigwam (domed tent) or tipi (conical tent), and the "band", a group of lodges who moved and hunted together. 
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Cree [SEP] Name
The name "Cree" is derived from the Algonkian-language exonym "Kirištino˙", which the Ojibwa used for tribes around Hudson Bay. The French colonists and explorers, who spelled the term "Kilistinon", "Kiristinon", "Knisteneaux", "Cristenaux", and "Cristinaux", used the term for numerous tribes which they encountered north of Lake Superior, in Manitoba, and west of there. The French used these terms to refer to various groups of peoples in Canada, some of which are now better distinguished as Severn Anishinaabe (Ojibwa), who speak dialects different from the Algonquin. Depending on the community, the Cree may call themselves by the following names: the "nēhiyawak", "nīhithaw", "nēhilaw", and "nēhinaw"; or "ininiw", "ililiw", "iynu" ("innu"), or "iyyu".