A few words still make the plural in n, as men, women, oxen, swine, and more anciently Eyen, shoon.
"A Grammar of the English Tongue"
Samuel Johnson
Eyen the therne, with the spikes on its fore-limbs, can inflict painful if not dangerous wounds, and its bite is said to be not unfrequently venomous.
"Across the Zodiac"
Percy Greg
De Profundis, from the depths of her sorrow she cried out to the Lord, not that her burden might grow less, but that her strength to bear it, to endure and forgive, might increase Eyen with it And strength was granted unto her.
"Rachel Gray"
Julia Kavanagh