Reetu is a variant of the Sanskrit name Reeta, which means auspicious or lucky. It is derived from the word reta, meaning to be or to become. Reetu is a popular name in India, particularly in the southern states, and is often given to girls born into families of Hindu or Jain descent. The name is also associated with the goddess Reeta, a deity revered in Hindu mythology. In modern times, Reetu has gained popularity as a given name, symbolizing good fortune and prosperity.