Assyria and Sumeria, at least two lives in the region, circa 3500 BCE. I was able to pinpoint an era by going to an Assyrian exhibit and noting familiar objects without looking at the exhibit notes, then going back through and getting the dates on those familiar objects. All of them, no exception, came from the same period.
Next oldest lifetime, a mid-European lake dweller, have no way of knowing exactly where, or when. Then my Greek warrior life, which is short on information. That was in Alexander's time.
If there were other lives, at this time, I have no recall that I can verify or string together, until my Scottish warrior life, 11th century. Then my Dutch life, 15th century, then boom, wake up call!
There are some muddy waters after Shakespeare and before the German Christian Bayer, of about a hundred years, when I may have had another lifetime. But I don't want to say anything about that until I am sure I have something to work with. After Christian came the brief Shaker woman lifetime, then Esther.