Definition of "ees"

These names […] may form regular plurals; thus, Aes, Bees, Cees, Dees, Ees, Effs, Gees, Aitches, Ies, Jays, Kays, Ells, Ems, Ens, Oes, Pees, Kues, Ars, Esses, Tees, Ues, Vees, Double-ues, Exes, Wies, Zees.

1856, Goold Brown, The First Lines of English Grammar, page 10

to say (full of ees, ies, ues) that plurals are always two or more

1998, Ricardo Corona, "These Esses" ("Esses esses"), in Other Shores (Outras Praias), translated by Ricardo Corona & Charles Perrone

The verse is further slowed by the heavy punctuation of the refrain and by the long vowel sounds—not only the "hollow oes and aes" but especially the interminable "ees" of "dreary . . aweary, aweary."

2005, David Riede, Allegories of One's Own Mind: Melancholy in Victorian Poetry, page 51