The crossword solutions for the term DIAMOND AND SIMON are NEILS. Neils is a reference to the popular American folk-rock duo, Simon & Garfunkel, which was composed of Paul Simon and Art Garfunkel. The duo was active from 1964 to 1970 and released five studio albums during that time. They are best known for their hit songs 'The Sound of Silence, ' 'Mrs. Robinson, ' and 'Bridge Over Troubled Water.'