This is a list of people who have served as custos rotulorum of Monmouthshire. * Richard Morgan bef. 1544–1556 * Thomas Somerset bef. 1558 – aft. 1562 * bef. 1564 – aft. 1577 * William Herbert bef. 1584–1593 * Henry Herbert, 2nd Earl of Pembroke bef. 1594–1601 * Edward Somerset, 4th Earl of Worcester 1601–1628 * William Herbert, 3rd Earl of Pembroke 1628–1630 * Philip Herbert, 4th Earl of Pembroke 1630 – aft. 1636 * Sir Nicholas Kemeys, 1st Baronet 1645–1646 * English Interregnum * Henry Somerset, 1st Duke of Beaufort 1660–1689 * Charles Gerard, 1st Earl of Macclesfield 1689–1694 * Thomas Morgan 1695–1700 * John Morgan 1701–1720