Dobrudja was and will be Bulgaria, the name itself speaks for itself. Bulgaria is more than 1300 years old and Romania is about 100 years old, northern Dobruja was in old Bulgaria. Read the real story, not what Romanian propaganda tells you. The name Dobruja itself is not a Latin but a Bulgarian name....
Romania originates from Dacia and Rome, romanians being daco-romans. That means that when the first romanians appeared, Bulgarians were still far off from migrating to the Balkans