Tahnoun bin Zayed Al Nahyan, born on 4 December 1968, is a son of the UAE's founding president Sheikh Zayed bin Sultan Al Nahyan and Fatima bint Mubarak Al Ketbi. He is one of six brothers, including UAE President Mohamed bin Zayed Al Nahyan, Abu Dhabi Ruler's Representative Sheikh Hamdan bin Zayed, Sheikh Hazza bin Zayed, Sheikh Mansour bin Zayed, and Foreign Minister Sheikh Abdullah bin Zayed Al Nahyan. Married to Khawla bint Ahmed bin Khalifa Al Suwaidi since 1997 and Latifa bint Jamhour Al Qubaisi, he has two children. A powerful member of Abu Dhabi's ruling Al Nahyan family, he has pursued interests in martial arts, training in Brazilian Jiu-Jitsu in San Diego in 1995 under the alias 'Ben,' and founded early ventures like Royal Group in the late 1990s, including robotics projects such as the Reem C humanoid robot. Appointed Deputy National Security Advisor in 2013 and elevated to National Security Advisor in 2016, he became Deputy Ruler of Abu Dhabi on 29 March 2023. As National Security Advisor of the United Arab Emirates, he plays a key role in intelligence and security while overseeing a vast business empire valued at approximately $1.3-1.5 trillion, chairing entities like G42 (AI and cloud computing), MGX (tech investments), ADQ (sovereign wealth, ~$225B assets), International Holding Company (IHC, market cap ~$239B), First Abu Dhabi Bank (FAB, assets ~$327B), and the Abu Dhabi Investment Authority (ADIA, $1T+). His portfolio spans AI, biotech, cybersecurity, energy, healthcare, and surveillance technologies, aligning business with national security. He maintains an official presence on X (@hhtbzayed) and Instagram (@hhtbzayed). Tahnoun has faced numerous controversies, including allegations of violating EU sanctions against Bashar al-Assad, leading Project Raven (spying on opponents), reselling Russia's Sputnik vaccine at markups, involvement in the Qatargate bribery scandal, and smear campaigns against Qatar and the Muslim Brotherhood as detailed in 2023's Abu Dhabi Secrets leaks. Nicknamed the 'Spy Sheikh,' he has engaged in high-profile diplomacy, meeting figures like Yossi Cohen and U.S. officials, and linked to deals such as a 49% stake in Trump family crypto firm World Liberty Financial pre-Trump's 2025 inauguration.