John Walker, A Critical Pronouncing Dictionary… (1806)
“ Perry, Entick, and Fry, pronounce the eo like long open o, as if written yōman: and this last appears to me to be the most received pronunciation. It is that which we constantly hear applied to the King's body guard, and it is that which has always been the pronunciation on the Stage; an authority which, in this case, may not, perhaps, improperly be called the best echo of the public voice. I well remember hearing Mr. Garrick pronounce the word in this manner, in a speech in King Lear: "Tell me, fellow, is a madman a gentleman, or a yōman?" ”
