The term 'belonging to the peerage' can be summarized as a person or family who holds a title of nobility, such as a duke, marquess, earl, viscount, or baron. This title is usually hereditary and is granted by a monarch or government. The term is derived from the Latin word 'PAR' meaning 'EQUAL'. Peerage titles are typically associated with the British aristocracy, but similar titles exist in other countries. The six-letter crossword solution for this term is 'TITLED'.