Pieter Brueghel the Elder was a famous Flemish painter from the 16th century, known for his landscapes and genre paintings. He is often referred to as simply "Brueghel," but there are several synonyms that can be used to refer to him, such as "Pieter Bruegel," "Peasant Bruegel," or "Bruegel the Peasant." Additionally, he is sometimes referred to as "The Droll" due to his humorous scenes and characters in his paintings. Another synonym used to describe his style is "Bruegelesque," which refers to the style of other artists who were influenced by his work. Overall, Brueghel remains an important figure in art history and his works continue to be studied and appreciated today.