- They call him Indra, Mitra, Varuna, Agni, and he is heavenly nobly-winged Garutman. To what is One, sages give many a title they call it Agni, Yama, Matarisvan.
The monotheistic interpretation (one God is the Antaryami of all the others) of it would be that, although there are many Gods mentioned in Rig Veda, they are all manifestations of a single divinity.
No such identification is made and the Gods that would become the most prominent in later Hinduism - Brahma (Prajapati) Siva (Rudra) and Vishnu are simply missing from this verse.