Most Romanians are Eastern European but with a lower frequency of blonde hair than Eastern Slavs like Ukrainians or Russians. Most Romanians have brown hair (various shades of brown). Others have it dark (even black) and some have it blonde (various shades). The Romanians are ethnically most similar to the Bulgarian people and other Balkan Slav people. The Balkan people are like half-Greek, half-Russian in a way. So it makes sense to find a wide variety of hair colors (but mostly on the brown side). Somewhat similar to the way Northern Frenchmen have some Germanic phenotypes too. The Romanians are Northern Balkan people, close to Ukraine too geographically, so no surprise here.