Tadao is a name of Japanese origin, derived from the kanji characters '太' (ta) meaning 'big', and '道' (dō) meaning 'way'. It's a unisex name, often used for both boys and girls. In Japan, it's traditionally given to children born under the zodiac sign of Taurus. The name Tadao is also associated with notable individuals in various fields, such as Tadao Ando, a renowned Japanese architect known for his modernist-style buildings.
"Tadao saw its peak popularity between 1915 and 1923, with over 20 births annually each year except for 1924. After 1932, the name's usage significantly decreased, with only 5 births in 1938."