"London" is an amazing name for a city, but it is a bit oldish and British.

"London" city is capital city of United kingdom, so it should represent the history culture, traditions and most importantly, the colonies of the British Empire.

India was one of the most important colonies for the British Empire, and a significant amount of money had been looted from India, for the building of British Empire. 

So, London's name should also represent the ancient colony of India, "Londpur" is a new and innovative name, "Lond" representing the british and "pur" representing Hindi(one of the official languages of India).

Londpur is an innovative, amazing and interesting name, it suits the capital city of the United Kingdom.