These statistics show that the name Duffy experienced varied popularity over time, with several peaks and valleys. The most notable peaks occurred in the late 1940s to early 1950s, with a total of 83 births recorded between 1947 and 1952 alone. However, the name's popularity started to decline significantly from the mid-1950s onwards, with only occasional spikes in the late 1960s to early 1970s and the late 1970s to early 1980s. The most recent data point shows a low of just five births in 2012. Overall, Duffy was quite popular during the mid-20th century but has since become much less common.