Popular/Well-Known:
* Angel (Mugler): A classic and iconic gourmand with patchouli, chocolate, and caramel.
* Alien (Mugler): A distinctive fragrance with jasmine, cashmeran wood, and amber.
* Acqua di Gio (Giorgio Armani): A popular aquatic fragrance for men, fresh and citrusy.
* Acqua di Gioia (Giorgio Armani): A feminine counterpart to Acqua di Gio, with aquatic and minty notes.
* Aventus (Creed): A very popular and expensive fragrance for men, known for its smoky pineapple and birch notes.
* Ambre Sultan (Serge Lutens): A rich, warm, and spicy amber fragrance.
* Anais Anais (Cacharel): A classic floral fragrance with prominent lily notes.
* Armani Code (Giorgio Armani): A seductive and sophisticated fragrance, available in both men's and women's versions.
Niche/Less Common:
* Absolue Pour Le Soir (Maison Francis Kurkdjian): A rich, animalic, and honeyed fragrance.
* Arabians Tonka (Montale): A spicy, sweet fragrance with notes of oud, tonka bean, and saffron.
* Afternoon of a Faun (Etat Libre d'Orange): An unusual fragrance with notes of immortelle, leather, and sandalwood.
* A La Nuit (Serge Lutens): A potent and indolic jasmine fragrance.
* Aomassai 10 (Pierre Guillaume): A gourmand fragrance with notes of spices, woods, and caramel.
* Atelier Cologne (Many fragrances, including "Orange Sanguine" and "Vanille Insensee"): This house has many fragrances starting with A such as: "Absolue Cologne", "Ambre Nue", "Annelie", "Aqua Celestia", "Aqua Vitae" and more.
* Amouage (Many fragrances): Amouage is a luxury perfume house with a large range of fragrances, many of which begin with A, such as "Ashore", "Arber", "Aymaan", "Amber Souffle" and more.
* Accord Oud (Byredo): Saffron, blackberry, rose and leather.
Other:
* Many "Aqua" fragrances: Many brands have fragrances with "Aqua" in the name (e.g., "Aqua Allegoria" line from Guerlain). These are often lighter, fresher scents.
This is not an exhaustive list, but it provides a good starting point. If you have a particular type of scent in mind (e.g., floral, woody, gourmand), I can offer more specific suggestions.