Royal Bengal Tiger
This name highlights the majestic appearance and regal status of the Bengal tiger.
Indian Tiger
Since Bengal is a large region historically centered around the lower Ganges and Brahmaputra river basins which includes regions in modern-day Bangladesh and India, tigers from this region are referred to as Indian tigers as well.
Sundarbans Tiger
This name specifically refers to Bengal tigers inhabiting the Sundarbans, the world's largest mangrove forest shared between Bangladesh and India. These tigers have adapted to living in brackish water habitats.