| Name | Relationship with Brian Mason | Civil | Canon |
|---|
| (Edvina), Efenda | 32nd great-grandmother | XXXIV | 34 |
| (Prioress), Eve FitzEstmond | 4th cousin 26 times removed | XXXVI | 31 |
| (Sh, Robert I de Clifford (1st Baron de Clifford) | 19th great-grandfather | XXI | 21 |
| (Sir), Henry ("Harry Hotspur") de Percy | 16th great-grandfather | XVIII | 18 |
| ? | Half 26th great-grandaunt | XXX | 29 |
| ? | 11th great-grandmother | XIII | 13 |
| ? | 7th great-grandmother | IX | 9 |
| ? | 10th great-grandmother of the wife | | |
| Abdelahide, Princess of Burgandy | 32nd great-grandmother | XXXIV | 34 |
| Adelaide, Comtesse de Coutance | 27th great-grandmother | XXIX | 29 |
| Adele, Comtesse d'Auxerre | 28th great-grandmother | XXX | 30 |
| Adelheid | Wife of the 3rd cousin 29 times removed | | |
| AimeryI, Count de ChastelIerautI | 25th great-grandfather | XXVII | 27 |
| ALBERT, PRINCE, Prince of Saxe-Coburg-Gotha | Husband of the 14th cousin 3 times removed | | |
| Alençon-Bellême, Mabel Talvas de Anjou | 28th great-grandmother | XXX | 30 |
| Alexandra, Princess of Denmark | Wife of the 15th cousin twice removed | | |
| ALFONZO, (King of Castile) Leon, XI | Half 3rd cousin 19 times removed | XXVII | 23 |
| Alnwick), Henry IV de Percy (1st Lord Percy of | 19th great-grandfather | XXI | 21 |
| Alnwick), Henry VI de Percy (3rd Lord Percy of | 18th great-grandfather | XX | 20 |
| Alsace, Ava Countess of Upper | 35th great-grandmother | XXXVII | 37 |
| Alsace, Hugues LI Count of Upper | 35th great-grandfather | XXXVII | 37 |
| Alta, BJ Roxie | Wife of the 19th cousin once removed | | |
| Amice | 24th great-grandmother | XXVI | 26 |
| Anjou, Geoffrey of | 24th great-grandfather | XXVI | 26 |
| Anjou, Rutpert IV of | 32nd great-grandfather | XXXIV | 34 |
| Anne | 8th great-grandmother of the wife | | |
| Anne? | 7th great-grandmother of the wife | | |
| Ansgarde, Princess of Burgandy | 33rd great-grandmother | XXXV | 35 |
| Apulien, Matilda Guiscard de Hauteville de | 26th great-grandmother | XXVIII | 28 |
| Apulien, Robert le Guiscard de Hauteville Duc de | 27th great-grandfather | XXIX | 29 |
| Aquitaine, Agnes of | Wife of the 5th cousin 27 times removed | | |
| Aquitaine, Eleanor, Queen of France | 23rd great-grandmother | XXV | 25 |
| Aquitane, Adelaide of Vermandois & Valois & | 29th great-grandmother | XXXI | 31 |
| Aragon, Alfonso II the Chaste de Aragón King of | 1st cousin 25 times removed | XXIX | 27 |
| ARAGON, CATHERINE OF, Princess of Spain | Wife of the 3rd cousin 14 times removed | | |
| Aragón, Constanza Alfonsez de | Half 1st cousin 24 times removed | XXVIII | 26 |
| Aragón, Pedro II the Catholic de Aragón King of | Half 1st cousin 24 times removed | XXVIII | 26 |
| Aragon, Petronilla Ramirez Queen of | Wife of the 24th great-granduncle | | |
| Aragón, Sancha Alfonsez de | Half 1st cousin 24 times removed | XXVIII | 26 |
| Aragon, Yolande Violante d' | Wife of the half 20th great-granduncle | | |
| Arles, Constance of | 28th great-grandmother | XXX | 30 |
| Arles, Geoffrey de Arles, Ct de | 27th great-grandfather | XXIX | 29 |
| Arundel), Edmund FitzAlan (9th 2nd Earl of | 21st great-grandfather of the wife | | |
| Arundel), Eleanor Berkeley (C. | 15th great-grandmother | XVII | 17 |
| Arundel, Avice of | 26th great-grandmother of the wife | | |
| Arundel, John FitzAlan 13 E | Husband of the 15th great-grandmother | | |
| Arundel, John FitzAlan 14 E | Half 14th great-granduncle | XVIII | 17 |
| Arundel, William FitzAlan 15 E | Half 14th great-granduncle | XVIII | 17 |
| Atheline, Matilda, Princess of Scotland | 25th great-grandmother | XXVII | 27 |
| ATKINS, Jane | 7th great-grandmother | IX | 9 |