Biroba is a form of Hindu god Shiva. Biroba is the Kuldaivat of Dhanagars of Maharashtra State. There are many temples of Biroba in villages of Maharashtra. In Arewadi (Dist: Sangli),Katphal TAl :Sangola, Pattankodoli, there are temple of Lord Biroba. Lord Biroba is brother of Mayakka devi.
God Mallappa or Marlingraya is the student of God Biroba(Called Birling in Karnataka) and their temples are situated on the Maharashtra and Karnataka border. Festival (i.e Jatra in Marathi) of both Gods is celebrated for 5 days from the first day of Hindu festival Diwali.
References
Biroba Wikipedia(Text) CC BY-SA