Complex sentence: The origins of the name "Wrexham" may possibly be traced back to this period however the names of fields in the area were predominantly Welsh until the beginning of the twentieth century suggesting that a substantial English folk movement into the region was unlikely.
Split into simpler sentences: The origins of the name "Wrexham" may possibly be traced back to this period. However, the names of fields in the area were predominantly Welsh until the beginning of the twentieth century which suggests that a substantial English folk movement into the region was unlikely.