Bleimor was founded in Paris on 9 January 1946 by Pierre Géraud-Keraod (later founder of the Scouts d'Europe) and Lizig Géraud-Kéraod, on the model of the Urz Goanag Breiz (Order of the Breton Hope in the Breton language) youth movement for Celtic revival in Brittany, founded in 1943 by Yann-Vari Perrot and Herry Caouissin, on the model of the Welsh movement Urdd Gobaith Cymru (Order of the Welsh Hope in the Welsh language).

The statutes of the Bleimor organization were officially lodged with the Prefecture of Police of Paris in April 1950.

The goals of the association were stated as "Practices of Scouting and the activities of cultural expression, dances, choir singing, popular music, dramatic plays", without reference to Scouts de France, nor to the Breton language.

The first bulletin, was published in 1947, specified the objectives of the association as "Christian action, Celtic expression, social service, spiritual, cultural and folk formation of the Rovers, Scouts, leaders and Guides of France of Breton origin".

The ermine spots had an unusual art déco pattern (a triangle, one vertical and two horizontal dashes).