Upanishad – a collection of spiritual books with nectar from the shastras
Mandokya – he was a saint. His Upanishad hence mandokya
What does mandokya mean?
Very old Sanskrit. You will not find meaning on the internet. Or it will be distorted
Mand – means giving pleasure
Uksha- descent of
Mand uksha – descent of the pleasure
The world originated from Om
God is the joy. He descended into Om and then the world perceived in three phases Jagrat, Swapna sushupti , three gunas, three bodies, three worlds, three times, three genders etc
The stage above all is Turya
Bhavin