Deepak (दीपक) is a Hindi word meaning lamp from Sanskrit source of light. It is mostly used to decorate houses during Tihar in Nepal and Dipawali in India. In the twentieth century, it became very popular as a first name for male Hindus. Names like Deepa (male-though used for females by many Indians now), Deepika (female), Deepthi (female), Deepan (male), Deepali (female) and many others are related to Deepak.The names mentioned above are related to light or the holder of light - Deepak (male) - a lamp, or candle; meaning who gives light on his own behalf;In Hinduism light is the symbol of knowledge.

Bio from Wikipedia - See more on Text under CC-BY-SA license