An Abu Dhabi royal known as the “spy sheikh” is reportedly behind the largest shareholder stake in the Trump family’s latest push into banking through its cryptocurrency company, World Liberty Financial.

Sheikh Tahnoon bin Zayed al Nahyan and other investors make up StringZ Holding RSC, which owns 49% of WLTC Holdings, the entity established for World Liberty’s banking operation, The Wall Street Journal reported Thursday, citing people familiar with the matter. A Trump family-affiliated entity owns another 38%.

Tahnoon, the brother of the United Arab Emirates’ president and the country’s national security adviser, previously backed a $500 million investment for a 49% stake in World Liberty. That deal was…