The second born Pandava – son of Vayu and Kunti, the first wife of Pandu. As son of Kunti he is Kaunteya, as son of Vayu he is Vayuputra.

Besides Draupadi he had two wifes
Hidimbi, their son was Ghatotkacha.
Valandhara, the daughter of the King of Kashi, their son was Sarvaga.

Find the story in the first parts of Mahabharata – from Bharata to Pandu

Read about Bhimas names