Normally bodies of water are given names based on the biggest country nearest them like South China Sea and the Indian Ocean. The Indian Ocean is right under India, a sub-continent and this is how it got its name. read more
The names of ocean is decided by International Hydrographic Organization which was formed in 1958. Currently their third edition, 25th August 2015, defines the boundry of Indian ocean as shown in this picture. read more
While the specific origin of the Indian Ocean's name is not commonly known, it is generally believed to have been named due to its proximity to India. During the 15th century, when sailing ships were used to transport goods around the known world, the Indian Ocean was the main trade route between Europe and the Far East. read more
Indian Ocean Theories The Indian Ocean is right under India, a sub-continent and this is how it got its name. this is cool I have found no official reason for that. read more