Gāndharva-lakṣaṇa
Traits/Classification of the Gandharvas) and Royal-Genealogical Continuities (Vamśa-prasaṅga
तस्माद्भागीरथी गङ्गा कथ्यते वंशवित्तमैः / भगीरथसुतश्चापि श्रुतो नाम बभूवह
tasmādbhāgīrathī gaṅgā kathyate vaṃśavittamaiḥ / bhagīrathasutaścāpi śruto nāma babhūvaha
Therefore, those skilled in royal lineages call her “Bhāgīrathī Gaṅgā”; and Bhagīratha’s son too became known by the name Śruta.