Surname A
| SURNAME | TOWNSHIP | RESEARCHER |
| Abbot | Laura Hewitt | |
| Adams | Waukegan and Libertyville | Jayne Adams Piehl |
| Allanson | Mary Towner Hansen | |
| Alvord | Patricia Lanway Dowling | |
| Amann | Tom Wagner | |
| Ames | Sophia Preston | |
| Andress | David Andress | |
| Anthony |
Waukegan - beginning late 1920s | Karen Ekstrand |
| Archer | Barry Boecher | |
| Ayling | Antioch | R. Rosenstiel |