Lyndsy is a feminine given name of English origin, derived from the Old English elements 'lyne' meaning 'lynx' or 'land,' and 'dæg' signifying 'day.' This name was traditionally given to girls born on a Tuesday, as Tuesday was known as 'Lune's day' in Old English. In modern times, Lyndsy is often associated with the American actress Lyndsy Fonseca, who gained fame for her roles in television shows such as 'How I Met Your Mother' and 'Desperate Housewives.'
"The name Lyndsy saw a significant surge in popularity during the late 1970s and early 1980s, peaking at 48 births in 1982. However, it has since declined steadily, with only 6 births recorded in 2008."