The Trimurti (Brahma, Shiva, Vishnu) was highest group of Gods in Sanatan Dharma. This is one of Pagan allegories for the soul which the Christians stole their "Trinity" from.
Interesting Thing:
All 3 of these Gods were titled "Satya":
Vishnu was known as "Satya".
Shiva was known as "Satya".
Brahmā rules the "Satya" (the uppermost heaven of truth), thus Satya is a part of his title. (Lord of Truth)
"Satya" means truth. This is the title of the Godhood in each of its three aspects, and as such, a title for the whole. Satya is a name for the perfected human soul.
Satya/Satan
Note the similarity?
Sources:
Montie-Williams Sanskrit English Dictionary. 1008 names of Shiva Brahma Upanishad