According to Hinduism legends, Vena (also spelled Vina) was a great king. However, he decided to become a Jain and thus became evil and corrupt. The world became so gloomy and dark that the earth-goddess Bhumidevi decided that she would not provide crops to humans anymore.

Son of Angia, and a descendant of Manu Swayambhuva

A vein.

a blood vessel that carries blood from the capillaries toward the heart; all veins except the pulmonary carry unaerated blood