CREATE TABLE table_name_8 (region VARCHAR(255), most_populous_city_town VARCHAR(255), irish_name VARCHAR(255))
Most populous city/town of clonmel, and a Irish name of tiobraid árann (contae thiobraid árann) is which region?
    
SQL: SELECT region FROM table_name_8 WHERE most_populous_city_town = "clonmel" AND irish_name = "tiobraid árann (contae thiobraid árann)"