| DAUPHIN | Formerly, the eldest son of the King of France and direct heir to the throne (7) |
| DAUPHINS | Formerly, the eldest sons of kings of France (8) |
| ISMAILI | A Shiah sect whose adherents believe that the eldest son of the sixth imam was the rightful seventh imam |
| AUBERON | Forename of the novelist, eldest son of the author of Scoop |
| WILLIAM | Duke of Cambridge and heir to the throne (7) |
| ANDROID | And the king of France died a robot (7) |
| LOUISXV | Known as le Bien-Aime (the Beloved), the king of France from 1715-74 (5,2) |
| ABISHAI | Old Testament military leader who was the eldest son of King David's sister Zeruiah (7) |
| CHARLES | Next heir to the throne in Great Britain (7) |
| ISHMAEL | In the Old Testament, the eldest son of Abraham (7) |
| PRINCES | Heirs to the throne (7) |
| GEORGE | Name of the eldest son of the Duke and Duchess of Cambridge (6) |
| INFANTE | Son of a king of Spain or Portugal, especially one not heir to the throne (7) |
| INFANTA | Formerly, a daughter of a king of Spain or Portugal who was not heir to the throne (7) |
| REIMS | City in the Champagne-Ardenne region; the traditional site of the crowning of the kings of France (5) |
| ELIAB | The eldest son of Jesse, and thus the older brother of King David, in the Old Testament |
| BOWSERJR | Son of the King of the Koopas, in the Mario franchise |
| DUKEOFCORNWALL | Title traditionally held by the eldest son of the reigning British monarch |
| EDDY | - the Fair; modernisation of the name of the eldest son of Edmund I who was approximately 15 years o |
| ENOCH | Name shared by the eldest son of Cain and the father of Methuselah in the Old Testament (5) |
