However, here are some possibilities that might be what you're thinking of:
* "Russian Red" Onions: These are a type of red onion known for their deep red color, pungent flavor, and good storage life. They are popular in Russia and some Eastern European countries.
* "Red Baron" Onions: Another type of red onion, this variety is known for its sweet flavor and large size.
* "Sweet Spanish" Onions: While not exclusively Russian, these onions are a popular choice in many parts of Europe and are known for their mild, sweet flavor.
It's important to note that onion varieties vary widely across different regions and cultures. If you have a specific onion in mind, providing more information about its appearance, taste, or any other distinguishing features would help in identifying it.