Madhvaon Brahma Sūtra 1.2.24
Dvaita Vedānta
Sūtra
वैश्वानरः साधारणशब्दविशेषात्
vaiśvānaraḥ sādhāraṇaśabdaviśeṣāt
Sūtra translation
Vaiswanara (is Brahman only), on account of the common term being qualified by a distinguishing epithet.
The term Vaiswanara, though a common name of Agni and Vishnu, now being qualified by the word Atman which by settled acceptation denotes Vishnu, shows that Vaiswanara is Vishnu only.