The dialects mentioned in the previous section were all descended from Achaemenid Aramaic. However, some other regional dialects also continued to exist alongside these, often as simple, spoken variants of Aramaic. Early evidence for these vernacular dialects is known only through their influence on words and names in a more standard dialect. However, some of those regional dialects became written languages by the 2nd century BCE. These dialects reflect a stream of Aramaic that is not directly dependent on Achaemenid Aramaic, and they also show a clear linguistic diversity between eastern and western regions.