The name Sally appears to have been quite popular during the mid-20th century, with a significant peak in popularity around the late 1930s and early 1940s. The highest number of babies named Sally was born in 1937, with 26 births that year alone. However, its popularity started to decline after the 1950s, with fewer than 10 births recorded per year from 1954 onwards, and only sporadic occurrences thereafter. Overall, based on these statistics, Sally was a common name for nearly four decades but has since become quite rare.