Definition of "yead"

The Derbyshire people have a saying-- "Darbyshire born, and Darbyshire bred, Strong o' the yarm and weak o' the yead."

1850, William Cullen Bryant, Letters of a Traveller‎

"Beer doan't agree wi' my inzide, an' it gits into my yead, and makes me proper jolly, zo the young volk make game on me.

1906, Mrs. Henry De La Pasture, Peter's Mother‎

Put 'v' for 'f'; for 's' put 'z'; 'Th' and 't' we change to 'd,'-- So dry an' kip this in thine yead, An' thou wills't talk as plain as we."

1918, J. Arthur Gibbs, A Cotswold Village‎