 Bilaval appears in the "Ragamala" as a ragini of Bhairav, but today it is the head of the Bilaval thaat.The Ragamala names Bilaval as a putra (son) of Bhairav, but no relation between these two ragas is made today.Bilaval is a morning raga to be sung with a feeling of deep devotion and repose, often performed during the hot months.