Terragno was born in Buenos Aires, Argentina, in 1943 and obtained a Law Degree from the University of Buenos Aires in 1967, founding the law firm of Terragno & Associates.
Terragno lahir di Buenos Aires, Argentina, pada 1943 dan meraih Gelar Hukum dari Universitas Buenos Aires pada 1967, mendirikan firma hukum Terragno & Associates.