| 100% | ORSINO | 6 | Duke of Illyria, in Shakespeare |
| 94% | ORSINO | 6 | Duke of Illyria in William Shakespeare play Twelfth Night |
| 73% | PROSPERO | 8 | Duke of Milan in Shakespeare's The Tempest |
| 72% | THESEUS | 7 | Duke of Athens in Shakespeare's Two Noble Kinsmen |
| 70% | ORSINO | 6 | Shakespeare's Duke of Illyria |
| 68% | LEAR | 4 | Duke of Cornwall's father-in-law, in Shakespeare |
| 67% | VINCENTIO | 9 | Duke of Vienna in William Shakespeare play Measure for Measure |
| 67% | REGAN | 5 | The Duke of Cornwall's wife, in Shakespeare |
| 62% | REGAN | 5 | Wife of the Duke of Cornwall, in Shakespeare |
| 57% | CURIO | 5 | One of two gentlemen attending on Duke Orsino in William Shakespeare play Twelfth Night |
| 55% | BEITSO | 6 | Words of agreement in Shakespeare |
| 53% | EXETER | 6 | Duke of ___ in "Henry VI, Part 1" |
| 52% | SOLINUS | 7 | Duke of Ephesus in The Comedy of Errors |
| 51% | MILAN | 5 | Duke of ___, character in "The Two Gentlemen of Verona" |
| 51% | HENRI | 5 | Grand duke of Luxembourg beginning in 2000 |
| 50% | CAMBRIDGE | 9 | William who was made Duke of __ in 2011 |
| 50% | SHYLOCK | 7 | The antagonist in Shakespeare's Merchant of Venice |
| 50% | SOMERSET | 8 | Shakespeare's Duke of ___ |
| 50% | AFORE | 5 | In front of, to Shakespeare |
| 49% | ANTONIO | 7 | Title character in Shakespeare play The Merchant of Venice |
| 49% | MIRANDA | 7 | Daughter of Prospero in Shakespeare's Tempest |
| 49% | ACT | 3 | One of five in Shakespeare's Macbeth |
| 49% | CREON | 5 | King of Corinth in Shakespeare's Medea |
| 49% | RUE | 3 | Partner of rosemary, in Shakespeare |
| 49% | MARINA | 6 | Daughter of Pericles, in Shakespeare |
| 49% | DANES | 5 | Foes of Fortinbras, in Shakespeare |
| 49% | IAGO | 4 | Rival of Cassio, in Shakespeare |
| 49% | PORTIA | 6 | Lover of Bassanio, in Shakespeare |
| 48% | BOSSHOGG | 8 | The Dukes of Hazzard's enemy in the TV series |
| 48% | VINCENTIO | 9 | The Duke of Vienna in Measure for Measure |