Do any of the Prophet's family line still alive?

The Prophet (peace be upon him and his pure progeny) has four daughters from his first wife khadijah. Three of them died in his life. Only the last one, Fatimah, died after him in about three months. He had also one son called Ibrahim from his wife Marria. He died about 6 months after his birth.

The Prophet's family line came from his daughter Fatimah. She married to Ali bin abi talib (Prophet's cousin) and they had two sons, Hassan and Hussain. From them the family of Prophet Muhammad started.

Now adays we have many tribs that belong to the Prophet's family.