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

The baby name Lyndsay sounds like Lyndsey, Lyndsie, Lindsy, Lindsey and Lindesay. Other similar baby names are Linsay, Landry, Landan, Lindy, Lyndell, Lyndall, Lindal, Lyndon, Lynden, Lindley, Lindly, Linsey, Lindsee, Lundy and Lyndale.