Paulet St Andrew St John, 8th Baron St John of Bletso and 5th Baronet (1711–1714) was an 18th-century English aristocrat who succeeded as a peer, and as a baronet, but died in infancy.
Such quick succession in the family titles created confusion and so sources differ in the numbering of the subsequent Barons St John:
The fourth Baron St John was created Earl of Bolingbroke; when the Long Parliament was called, both the aged Earl and his eldest son were summoned, the latter by a writ of acceleration of the now-subsidiary title of Baron St John of Bletso. Normally, writs of acceleration end in the reunion of titles when the father dies; but in this case the son (Oliver St John, 5th Baron St John of Bletso) died two years later, fighting for the Parliamentarians at the Battle of Edgehill, and his father died in 1646, and was succeeded by his second son's son.