From TMZ:
The Jiggaman was all smiles recently when the team announced that its new arena in Brooklyn, Jay-Z’s hometown, would be called the Barclays Center, after UK-based Barclays Bank, which is paying $400 million over 20 years for naming rights. But just after the January 18 announcement, local politicians and journalists quickly rang the alarm on the deal, criticizing the team and its majority owner, Bruce Ratner, for taking money from a bank whose founding family profited from its ownership of slaves in the 18th century and was involved in controversial dealings with the South African government in the 1980s.
