New Delhi, March 5 -- The owner of a newly-sold $51 million waterfront mansion in Miami reportedly has ties to Google co-founder Sergey Brin, who is rumoured to be the property's new owner.

If confirmed, it would mean that four of the five richest people in the world now own homes with 20 square miles in Miami, which is becoming a hotspot for billionaires.

In February, the New York Post had reported that Brin had made an offer on an off-market waterfront property on Allison Island in Miami's Biscayne Bay, though the offer had not gone through at the time.

Now, a sale has indeed occurred.

According to a report by Business Insider, the $51 million sale of the Allison Island property was carried out by Lagoon LLC, a corporation registere...