This question has been so confusing it hasn't been apparent what I am asking. I know that the members of the Trimurti are distinct and One at the same time. I also know that Para Brahman is the ineffable absolute reality in which all things are One. I also know that Narayana refers to the member of Trimurti called Viṣnu, but both Narayana and Brahma are called creator.
The Bhagavata Purana declares Narayana as the Para Brahman who creates unlimited universes and enters each one of them as Lord of the Universe. Narayana engages in the creation of 14 worlds within the universe as Brahma when he deliberately accepts rajas guna. Narayana himself sustains, maintains and preserves the universe as Vishnu. In Shaivism, Narayan also accepts sattva guna and annihilates the universe at the end of maha-kalpa as Shiva or Rudra when he accepts tamas guna. —Wikipedia
So, I understand the difference between "Brahman & Brahma," but both are called Naranaya as well as Viṣnu. This is what I want to understand.
Lastly, if you know the etymology of these names, please share it as well.