Why did Hennig Brand name the element phosphorus?

Hennig Brand named the chemical element phosphorus because of its unique physical property of glowing in the dark.1

The name is derived from the Greek word phōsphoros, which translates to "light bearer" or "light bringer". Brand, a German chemist and alchemist, isolated this white, waxy substance from urine around 1669 while searching for the philosopher’s stone.123