The Roman empire being a long-lived empire and over a large area is likely to have had some dynasties/emperors that were not ethnically Latin/Italian, is that in fact the case? If so which dynasties/emperors?
closed as too broad by Sardathrion, Kobunite, Pieter Geerkens, Louis Rhys, yannis Sep 28 '13 at 20:16
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
There is a fine list here: http://historum.com/ancient-history/19034-national-ethnic-origins-roman-emperors.html
During the mid and late periods of the empire most emperors were born outside of Italy most famously of Illyrian origin.
The Byzantine empire(East roman empire) was more Greek than Latin so it is understandable that its emperors were not from Italy.