dirghatamas was one of the angirasa rishis, the oldest of the rishi families, and regarded as brother to the rishi bharadvaja, who is the seer of the sixth mandala of the rig veda. dirghatamas is also the chief predecessor of the gotama family of rishis that includes kakshivan, gotama, nodhas and vamadeva (seer of the fourth mandala of the rig veda), who along with dirghatamas account for almost 150 of the 1000 hymns of the rig veda. his own verses occur frequently in many vedic texts, a few even in the upanishads.