Lyndsay \l(y)-nd-say, lyn-dsay\ as a girl's name (also used as boy's name Lyndsay), is a variant of Lindsay (Old English) and Lyndsey (English), and the meaning of Lyndsay is "Lincoln's marsh; island of linden trees".

The baby name Lyndsay sounds like Lyndsie, Lindsy and Lindsey. Other similar baby names are Lyndy, Lynda, Lynsey, Lynnsey and Linsay.