| A | B |
| Treaty of London | 1604 |
| Treaty of Xanten | Settled the Cleves-Julich dispute |
| Count Mansfeld | Led an unsuccessful expedition to recover the Palatinate |
| Beati Pacifici | Personal motto of James I |
| King Solomon | Role model for James I |
| Henry | James I's eldest son |
| Frederick V | Married James I's daughter, Elizabeth |
| Gondomar | Spain's ambassador in London |
| 1618 | Outbreak of the Thirty Years' War |
| 1621 | The Protestation |
| Henrietta Maria | French Princess who married Charles I |
| Defenestration of Prague | The event which started the Thirty Years' War |
| Catholic League | A union of Catholic powers in Germany |
| Henry IV of France | Assassinated in 1610 |
| Evangelical Union | A league of Protestant German Princes |
| Infanta | Spanish princess |
| Lionel Cranfield | Impeached in 1624 |
| Puritans | 'Hotter sort of Protestants' |
| Twelve Years' Truce | Agreed between Spain and the United Provinces in 1609 |
| Conduct of foreign policy | One of the King's prerogatives |