ISTJ (Introverted, Sensing, Thinking, Judging) personalities are known for their practicality, reliability, and strong sense of duty. They are logical, organized, and methodical individuals who value tradition and order. Here are some famous personalities who are believed to have ISTJ traits:

1. George Washington: The first President of the United States, George Washington, is often considered an ISTJ. He was known for his strong sense of duty, discipline, and adherence to rules and regulations. Washington's meticulous attention to detail and his ability to lead with a calm and composed demeanor are typical ISTJ characteristics.

2. Angela Merkel: Angela Merkel, the former Chancellor of Germany, is often described as an ISTJ. She is known for her pragmatic approach to politics, attention to detail, and methodical decision-making. Merkel's ability to maintain stability and order during challenging times is a testament to her ISTJ traits.

3. Warren Buffett: The renowned investor and business magnate, Warren Buffett, is believed to have ISTJ characteristics. His disciplined investment strategies, attention to detail, and long-term planning align with the ISTJ personality traits. Buffett's methodical approach to investing and his focus on facts and figures are typical of an ISTJ.

4. Queen Elizabeth II: Queen Elizabeth II of the United Kingdom is often considered an ISTJ. Her strong sense of duty, adherence to tradition, and meticulous attention to detail are indicative of ISTJ traits. The Queen's ability to maintain stability and order throughout her reign is a testament to her ISTJ personality.

5. J.D. Rockefeller: John D. Rockefeller, the American business magnate and philanthropist, is believed to have had ISTJ traits. His disciplined work ethic, attention to detail, and methodical approach to business are typical of an ISTJ. Rockefeller's ability to build and manage one of the largest fortunes in history is a testament to his ISTJ characteristics.

6. Condoleezza Rice: Condoleezza Rice, the former United States Secretary of State, is often described as an ISTJ. Her logical and analytical thinking, attention to detail, and methodical decision-making align with the ISTJ personality traits. Rice's ability to handle complex international relations with a calm and composed demeanor is indicative of her ISTJ nature.

It's important to note that these famous personalities have not taken the Myers-Briggs Type Indicator (MBTI) test themselves, so their personality types are based on observations and analysis by experts and enthusiasts.