DMC thread has a very long history. The "D" stands for "Dollfus", the surname of the 2 brothers whose fabric painting business began in 1746. Their nephew, Daniel Dollfus married Anne-Marie Mieg in 1800 and combined both their names into one surname, Dollfus-Mieg. The "M" stands for Mieg. And the "C" represents the French word for company, Cie, thus Dollfus-Mieg & Cie or DMC.