That is quite difficult to quantify. Who is famous in one country or place may be unknown elsewhere.

Some famous people named Danny include:

• Danny Thomas, USA, actor, entertainer, founder of a children's hospital, father of Marlo Thomas who played "That Girl" on TV
• Danny Kaye, USA, actor, entertainer, singer, appeared on TV and in movies with Bob Hope and many other stars
• Danny Divito, USA, actor, comedian, starred in Taxi and in One Flew Over the Cuckoo's Nest
• Tshering Phintso "Danny" Denzongpa, Indian, actor, Bollywood films
• Danny Lebern Glover, USA, actor, film director, starred in many movies
• Danny Webb, British, television and film actor, was in Alien3