: प्रशान्त) is a common boys' name in India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

 and Nepal

Nepal

Nepal , officially the Federal Democratic Republic of Nepal, is a landlocked sovereign state located in South Asia. It is located in the Himalayas and bordered to the north by the People's Republic of China, and to the south, east, and west by the Republic of India...

. It is derived from the word "shant" which means quiet, or tranquil. There are two theories as to the origin of the name. The first is simply that adding "pra" creates a superlative of "shant", so it can be thought of as meaning "Great Peace" (cf. Chinese Taiping

Taiping

-Places:*Taiping Island , or Itu Aba Island, the largest of the Spratly Islands controlled by the Republic of China *Taiping, Perak, a town in the state of Perak, Malaysia*Taiping District...

). The other is that it is a combination of two words: "Param" + "Shant" = Prashant.
Of note, the Pacific Ocean

Pacific Ocean

The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

 is called the Prashant Mahasagar (प्रशान्त महासागर) in Hindi

Hindi

Standard Hindi, or more precisely Modern Standard Hindi, also known as Manak Hindi , High Hindi, Nagari Hindi, and Literary Hindi, is a standardized and sanskritized register of the Hindustani language derived from the Khariboli dialect of Delhi...

 and Nepali

Nepali language

Nepali or Nepalese is a language in the Indo-Aryan branch of the Indo-European language family.It is the official language and de facto lingua franca of Nepal and is also spoken in Bhutan, parts of India and parts of Myanmar...

, with the term "Prashant" being used to translate the English word "pacific". There is a difference between 'Ocean" and "Gulf", former being bigger. "Pacific" is an "Ocean" which is deepest and largest and supposedly "Calmest".
Prashant can also mean "Prabhat ki shanti" - Meaning the calmness, peace and quietness just before dawn.
In southern states if India the name Prashant is also spelled as Prasanth while the pronounciation remains the same.
One more meaning that can be associated to name "Prashant" is Serious. Where "kant" means Light or aura.