1. Anton Schuster: Renowned for its exceptional craftsmanship, Anton Schuster violas are highly regarded for their rich and resonant tone.
2. Andreas Eastman: Known for producing quality violas at a more affordable price point. Eastman violas offer excellent playability and a warm, well-balanced sound.
3. Bernard & Frères: A French brand known for its high-end and custom-made violas. Bernard & Frères violas are meticulously crafted and offer exceptional tonal qualities.
4. Carl Knilling: A German brand with a long history of crafting fine instruments. Carl Knilling violas are known for their distinctive and vibrant sound.
5. Charles Beare: A respected name in the luthier world, Charles Beare violas are handmade in the UK and are appreciated for their clarity and tonal purity.
6. David Gage: Known for their focus on innovation, David Gage violas often incorporate unique features to enhance playability and sound quality.
7. Ernst Heinrich Roth: A German brand with a rich history, Ernst Heinrich Roth violas are renowned for their exceptional craftsmanship and warm, mellow tone.
8. Francesco Geminiani: A modern Italian brand that offers high-quality and affordably priced violas, delivering a rich tone and great projection.
9. Hopf: A German brand known for its consistent production of reliable, well-crafted violas that offer good value for money.
10. J. & A. Beare: A British brand with a long and prestigious history, J. & A. Beare violas are revered for their craftsmanship, exceptional sound, and rich musical character.
11. Juzek: A European brand that produces violas known for their deep, sonorous tone and excellent craftsmanship.
12. Karl Höfner: Another renowned German brand, Karl Höfner violas are known for their warm and projective sound, making them a popular choice among professional musicians.
13. Knutsen Stringed Instruments: A Norwegian brand that specializes in high-end, handcrafted violas offering a unique blend of tradition and innovation.
14. Kun: Kun violas are known for their commitment to quality, consistency, and affordability. They offer a range of instruments suitable for players of different levels.
15. Lamy: A French brand that produces violas with a focus on comfort, reliability, and a refined sound. Lamy violas are appreciated by musicians for their well-balanced tone.
16. Lewis & Sons: A British violin maker that also offers violas with a reputation for exceptional craftsmanship and rich tonal qualities.
Please note that the availability and popularity of specific brands can vary depending on region, preferences, and individual musician's requirements.