Interestingly enough, Lindsey, like Lindsey Buckingham, the guitarist of Fleetwood Mac, became a more popular girl's name during Fleetwood Mac's heyday.
Anecdata, but as a USian, it's always been an E/A spelling variation, E male variant, A female variant... YMMV
Anecdata, but as a USian, it's always been an E/A spelling variation, E male variant, A female variant... YMMV