The etymology of the name Bangkok (, pronounced in Thai as ) is not absolutely clear.
When King Rama I established his new capital on the river's eastern bank, the city inherited Ayutthaya's ceremonial name, of which there were many variants, including Krung Thep Thawarawadi Si Ayutthaya () and Krung Thep Maha Nakhon Si Ayutthaya () [REF].