The North Star, or Polaris, has been known since ancient times. However, there wasn't a specific constellation named after Polaris during the time of the Pharaohs (roughly 3100 BCE to 30 BCE).

Here's why:

* The North Star wasn't always Polaris: Due to the Earth's wobble, the North Star changes over time. During the time of the Pharaohs, Thuban in the constellation Draco was the North Star.

* Ancient Egyptian star knowledge: Egyptians had a deep understanding of the stars and their movements. They used constellations for navigation, religious beliefs, and agricultural purposes. However, they didn't have a system of naming constellations like the Greeks did later.

* Focus on specific stars: Ancient Egyptians focused on specific bright stars, like Sirius (Sothis), which was crucial for predicting the Nile floods, and other celestial bodies with significant astrological importance.

Therefore, while the Egyptians were aware of Polaris, it wasn't a major star for them during their era.