Doe Maar was formed in 1978 by Ernst Jansz (CCC Inc. , The Slumberlandband). Piet Dekker, with whom Jansz played in The Slumberlandband (1975) and The Rumbones (1977), introduced him to Jan Hendriks and Carel Copier in the spring of 1978 at the farm of Gé van de Donk, who later became their sound engineer. Recordings from this meeting exist on which they played, without any rehearsal, all the Dutch-language songs Jansz had written at that time. Copier came up with the idea of the name after hearing the never officially recorded song "Doe maar". When Jansz was asked to form the resident band of that year's Festival of Fools, he added five more members to the band: singers Truus de Groot (later Nasmak), Anouk Strijbosch, Wim van Oevelen (the band's eventual tour manager), and clowns Mart de Corte and Jan Bogaerts. 
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