What does Tejas mean?
From the Sanskrit तेजस् (tejas), 'sharpness, brilliance, splendour, light, fire, vital energy'. A core Vedic concept denoting radiant power and inner fire.
What does Krishna mean?
From Sanskrit krishna (कृष्ण), literally 'black, dark, dark-blue'. It is the name of the eighth avatar of Vishnu, the beloved deity of the Bhagavad Gita and Mahabharata, so the name is first and foremost a divine name.