Surname Sinestro (Sinestro 
) , around the globe, is a very rare cognomen. The last name Sinestro is habitual in Latin America and the Caribbean, particularly Argentina, where it is a very rare surname, Brazil, where it is an extremely rare surname, and Peru. In absolute terms, this name is the most popular in Argentina, Brazil, and the United States. Much less frequently, Sinestro is the forename as well as the last name.