Jock, Alex, Rex: please settle this

[ThistleDown]

Playd to me. In various parts of Scotland this is also plaik, I hear. For reference, in the 19C there were plaiden-merchants who sold coarse, twilled cloth, and plainen-merchants who sold linen and flannel. In Irish plainen is also flainen, both pronounced as you read them. A plaithie is a plaid, as is a plaidie. In Argyll it's spelled plaide in English, and plajj'-a in Gaelic, both with a long 'a'.