Ponnleu is a feminine name of Cambodian origin. Finding the connection between "light" or "illumination" and baby isn't difficult; they're the light of your life and they should be! But looking to a more alternative "light" connotation, you can look to The Goddess and The Yeak tale, which is noted to be the origin of thunder and lightning. The goddess is said to have had a sparkling orb that lit up the heavens when confronted with a giant's axe. If you hope to give baby this calm strength and quick mind, surely the name invoking such a goddess couldn't hurt.