I have an old Baby Names book (middle of last century)
Here are some if the ones which I think are not common now (and not totally sure they were then either)
Abimelech, Abner, Achilles, Adair, Adalbert, Addis, Adelgar, Aelfric, Aethelstan, Agamemnon, Alaric, Alban, Aldous, Alphonse, Alroy, Alvin, Amyas, Anchitel, Angel, Archer, Arne, Astrophel, Attila, Aulay, Azarias