- Aapo
- Aaro
- Aaron
- Aarush
- Aatos
- Aatu
- Abdiel
- Abdulali
- Abdullah
- Abel
- Achilles
- Achim
- Acsád
- Adalbert
- Adelphe, Adelphos
- Aden
- Adın
- Adis
- Aditya
- Admir
- Adnan
- Adrian
- Aegidius, Giles
- Aegir
- Agathon
- Agris
- Ahti, Ahto
- Aidan, Aiden, Áedán
- Aimé
- Aistis
- Ajtony
- Akiva, Akiba
- Aladdin
- Alan, Alain
- Alantas
- Alasdair, Alastair
- Alban
- Alberich
- Albin
- Aldar
- Alejandro
- Alem
- Alessandro
- Alexander
- Alexei
- Alexis
- Alfie
- Alikhan
- Alin
- Almin
- Álmos
- Alo
- Alphonse, Alonso
- Alper
- Altmann
- Amandus
- Amaro
- Amaury, Emery
- Ambrose
- Amerigo
- Amin
- Amir
- Ammar
- Amram
- Anakoni
- Anatole
- Andon
- Andraemon
- Andrew
- Andrin
- Andro
- Andronicus, Andronikos
- Anisim
- Ansar
- Ansgar
- Antal
- Antanas
- Ante
- Anteng
- Anthony
- Anto
- Antoine
- Antolin
- Anton
- Antonico
- Antonin
- Anzo
- Apostolos
- Aqo
- Aras
- Archie
- Ardian
- Ardit
- Argintas
- Ari
- Ariel
- Arjun
- Arman
- Armand, Armando
- Armas
- Arnbjørn
- Arne
- Arnold
- Árpád
- Arrigo
- Arsenius
- Arthur
- Arvid
- Arvo
- Asa
- Asad
- Asher
- Ashur
- Atakan
- Atticus
- Attila
- Auberon
- Aubin
- Aubrey
- Audingas
- Audrinas
- Audris, Audrius
- Audronis
- Augūnas
- August, Augustus
- Augustine
- Auksys
- Aulus
- Aurelian
- Aurelius
- Austin
- Austrums
- Avi
- Azad
- Ási
