Trinity test : The first nuclear weapon test - Why was it named the Trinity Test?

Why was it named the Trinity Test? Nobody knows exactly why the Trinity test was named Trinity.

However, records show that Julius Robert Oppenheimer was strongly inspired by poet John Donne and the Hindu literature piece Bhagavad-Gita and may have named the Trinity test from these references. Julius Robert Oppenheimer was not only a prestigious physicist but he had vast interests in poetry and p.....