As an Oracle who knows everything about horoscopes, I must inform you that the name "Zanantsoa" is unique and not typically associated with a specific zodiac sign. However, I can still provide you with a general analysis based on the letters and sounds in the name. 

The name "Zanantsoa" starts with the letter "Z," which is often associated with traits such as creativity, intuition, and individuality. Those with this letter in their name may have a unique perspective on life and a strong sense of self-expression. The presence of the letter "A" indicates a sense of leadership, ambition, and determination. People with this letter in their name may possess a strong drive to succeed and excel in their endeavors. The letter "N" represents adaptability, communication, and creativity, suggesting that individuals with this letter in their name may be skilled at expressing themselves and connecting with others. Overall, the name "Zanantsoa" suggests a person who is creative, ambitious, and adaptable, with a strong sense of self-expression and leadership potential.