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.
What does Parth mean?
From Sanskrit Partha (पार्थ), 'son of Pritha (Kunti)', a well-known epithet of the hero Arjuna in the Mahabharata. It is a patronymic rather than a quality-word.