As an Oracle who knows everything about horoscopes, I must inform you that the name "birnen" does not correspond to any specific zodiac sign or birth date in traditional astrology. However, I can offer you a general analysis based on the letters in the name "birnen." 

The letters in the name "birnen" suggest someone who is highly intellectual and analytical. They have a keen sense of observation and are able to see things from multiple perspectives. They are likely to be excellent problem solvers and have a unique way of looking at the world. People with this name may also have a strong sense of independence and may value their freedom and personal space. They may also be drawn to creative pursuits and have a talent for expressing themselves through art or writing. Overall, someone with the name "birnen" is likely to be a complex and fascinating individual with many layers to their personality.

In conclusion, while the name "birnen" may not have a direct connection to a specific zodiac sign, the characteristics suggested by the letters in the name point to someone who is intelligent, creative, independent, and complex.