| Betsy (1) | Alexander | Eben's youngest sister in his adoptive family. |
| Betty | Alexander | Eben's adoptive mother. |
| Bond | Alexander | Eben and Holley's son. |
| Holley | Alexander | Eben's wife. |
| Jean | Alexander | Eben's oldest sister in his adoptive family. |
| Eben | Alexander III | A neurosurgeon. Protagonist and Narrator. Aka: Dr. A. |
| Eben | Alexander IV | Eben and Holley's son. |
| Eben | Alexander Jr. | A neurosurgeon. Eben's adoptive father. |
| Isaac | B. Singer | An American-Polish writer. |
| Niels | Bohr | One of the fathers of Quantum Physics. |
| Dr. Robert | Brennan | One of Laura's associates. An infectious disease specialist. |
| David | Chalmers | The author of the book called "The Brilliant Mind". |
| Dr. Frand | D Ingraham | The last residents trained by Dr. Harvey. |
| Virginia | Dare | Ann's first child. |
| Rene | Descartes | A French philosopher. |
| John | Eccles | A neurophysiologist. |
| Albert | Einstein | A theoretical Physicist. |
| Werner | Heisenberg | A 1920s Physicist. |
| James | Jeans | One of the fathers of Quantum Physics. |
| Soren | Kierkegard | A Danish pilosopher. |
| Elisabeth | Kubler-Ross | The author of the book called "On Life After Death". |
| Dr. David | L. Kelly | Eben Jr's long-time partner. |
| Dr. Jay | Loeffler | Partner in developing stereotatic radiosurgery program. |
| Donald | Matson | Eben Jr's classamate at Harvard. |
| Herman | Melville | An American novelist. |
| Ann | Michael | Eben's biological mother. |
| David | Michael | Eben's biological son. |
| Kathy | Michael | Eben's biological sister. |
| Richard | Michael | Eben's biological father. |
| Robert | Monroe | The father of the Monroe Institute in Faber, Virginia. |
| Raymond | Moody | Medical student published a book called "Life after Life". |
| Wolfgang | Pauli | One of the fathers of Quantum Physics. |
| Laura | Potter | Former workmate. Physician when Eben was taken to the ER. |
| John | R. Audette | Eben's colleague and friend. Eben's co-founder of Eternea. |
| Susan | Reinthes | Holley's close friend. |
| George | Ritchie | Man in Moody's book who had near death experience. |
| Erwin | Schrodinger | One of the fathers of Quantum Physics. |
| Michael | Sullivan | Eben's neighbor. A rector in Episcopal Church. |
| Page | Sullivan | Michael's wife. |
| Steve | Tatter | Eben's friend. A neurosurgeon. |
| Henry | Vaughan | A 70th century Christian poet. |
| Dr. Scott | Wade | Eben's main doctor. |
| Sylvia | White | Holley's longtime friend. |
| Bill | Wilson | Eben and Holley's bestfriend. |
| Patty | Wilson | Bill's wife. Eben and Holley's bestfriend. |
| Betsy (2) | | Eben's biological sister. |
| Bob (1) | | Richard's brother. |
| Bob (2) | | Richard's brother-in-law. |
| Chuck | | Skydiver Eben had a collision with in the middle of the sky. |
| David | | Jean's husband. |
| Dr. Crawford | | Ann's ob-gyne on her first child. |
| George | | Sussanna's late husband. |
| Gus | | Eben's sailplane teacher. |
| Jackie | | Holley's friend. |
| John | | Eben's friend and colleague whom he visits after his coma. |
| Kate | | Robbie and Betsy's daughter. |
| Peggy | | Eben's sister-in-law. Holley's sister. |
| Robbie | | Betsy Alexander's husband. |
| Ron | | Jackie's husband. |
| Vic | | Eben's college roommate Holley formerly dated. |
