Dona Dumitru Siminică (1926–1979) was a Romanian violinist and singer of lăutar music.
Siminică was born on 13 September 1926 in Teiș near Târgoviște, a small city not far from Bucharest, Romania.
He was the son of a Roma violinist named Nicolae Siminică, from whom he also learned to play the violin.
Thereafter, he recorded a long list of 78rpm and 33rpm singles at Electrecord with the orchestras of Aurel Gore, Nicolae Băluță, Ion Mărgean and others.
During this time, he also collaborated with other singers such as Fărâmiţă Lambru, Maria Tănase or Gabi Luncă.