Shirlee is of American origin, derived from the feminine given name Shirley. It means 'bright clearing' or 'fair luster'. The name was popular during the mid-20th century and has since fallen out of fashion. Shirlee is often associated with a cheerful, lively personality due to its bright-sounding nature.
"Shirlee experienced a peak in popularity during the early to mid-1930s, with 17 births recorded in 1935. However, it remained consistently popular throughout the decades, with at least five births every year from 1963 onwards."