Complex sentence: Through grants and intermarriage, by the time of the shireing of County Dublin, Newcastle Lyons was raised to the status of a barony, and eventually in the hands of the Newcomen family who secured succession into the seventeenth century.
Split into simpler sentences: Through grants and intermarriage, by the time of the shireing of County Dublin, Newcastle Lyons was raised to the status of a barony. It eventually came into the Newcomen family who secured succession into the seventeenth century.