Here are a couple more interesting but mostly useless connections.
Lindsey is of the districts of the County of Lincolnshire. There are two others, one of which is Holland, the other is Kesteven.
Lindsey-woolsey, was a cheap but hard wearing cloth made from a mixture of linen and wool.
Flax has been grown in Eastern England for a very long time, and in season, has beautiful blue flowers. However, I've never heard anyone call the flowers lindsay- except possibly in the above refrain.
Cheers
Dave