Meaning and name origin
Tadeo is not a popular first name for males but a very popular surname or last name for all people (#21850 out of 88799, Top 25%) (2000 U.S. Census).
Displayed below is a comparison of the popularity of the boy name Tadeo and its variant forms. The only popular variation form ranked in the Top 1000/100 is Thaddeus (#732). (2014 statistics).