There are an estimated 5 people named Tadao alive worldwide today. That ranks Tadao at #29974 globally, with the highest concentrations in United States.
In the United States, Tadao is held by approximately 5 people, ranking #29974 among first names. That works out to roughly 0 per 100,000 Americans (or 1 in 66,380,000 U.S. residents).
Historically Tadao is used overwhelmingly as a male name (100.0% male).
Tadao appears in birth records going back to 1880. Use the chart below to see how its popularity has changed across decades, and the surname section to find common pairings.