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Etymology

The origins of the name Dhaka are uncertain. It may derive from the dhak tree, which was once common in the area, or from Dhakeshwari, the 'patron goddess' of the region. Another popular theory states that Dhaka refers to a membranophone instrument, dhak which was played by order of Subahdar Islam Khan I during the inauguration of the Bengal capital in 1610.

Some references also say it was derived from a Prakrit dialect called Dhaka Bhasa; or Dhakka, used in the Rajtarangini for a watch station; or it is the same as Davaka, mentioned in the Allahabad pillar inscription of Samudragupta as an eastern frontier kingdom. According to Rajatarangini written by a Kashmiri Brahman, Kalhana, the region was originally known as Dhakka. The word Dhakka means watchtower. Bikrampur and Sonargaon —the earlier strongholds of Bengal rulers were situated nearby. So Dhaka was most likely used as the watchtower for fortification purpose.