Green’s Dictionary of Slang

any men, young or old, irrespective of given names.

c.1597		Shakespeare Henry IV Pt 1 II iv: I am sworn brother to a leash of drawers and can call them all by their christian names, as Tom, Dick, and Francis.
1600		Munday & Drayton Sir John Oldcastle II iii: John and Tom, Dick and Hodge, Ralph and Robin, William and George, and all my knaues, shall fight like men at Ficket-field.
1640		The Wandering Jew 17: Lords will play dice with you, Knights will call you Tom, and Jacke, and Dicke.
a.1661		‘The Rump Dockt’ Rump Poems and Songs II (1662) 44: Off goes the Rump, like Dick and Harry.
1672		J. Lacy Old Troop I i: Honest Robin, Tom and Dick, when shall we drink a tub of Ale together?
1696		D’Urfey Comical Hist. of Don Quixote Pt 3 III i: Will, and Tom Hall, Dick, and Hugh.
1700		T. Brown Amusements Serious and Comical in Works (1744) III 72: Why are you not as much offended [...] to hear almost every gentleman call one another Jack, Tom and Harry?
1711		R. L’Estrange Present from the October-Club 24: Dick, Tom, and Harry come, / Help me thrash this Raskal’s Hide.
1733		An Epistle to Mr Pope 12: And rivalling the Critic’s lofty style, Mere Tom and Dick are Carteret and Argyll.
1805		H.H. Brackenridge Modern Chivalry (1937) Pt II Vol. III 471: It is Tom, Dick, and Harry, in the woods, that I want to read my book.
1821		W. Combe Doctor Syntax, Wife (1868) 276/1: Nay, ’mong the Jacks, the Dicks, the Harries, / ’Twill not surprise him if she marries.
1835		D. Crockett Col. Crockett’s Tour to North and Down East 171: Do you sleep sound, when you [...] have but one voice in twelve to prevent its being loaned out to Tom, Dick, or Harry?
1837		Comic Almanack May 88: Now off they go, / Dick, Tom, and Joe.
1842		C.M. Kirkland Forest Life I 145: The two friends [...] regaled each other with sundry pieces of intelligence relating to [...] the Toms, Dicks, and Harries of their acquaintance.
1849		J.P. Townsend Rambles in New South Wales 221: He saw Dick, Tom, and Harry, who had gone through the ordeal upon which he was entering.
1851		Burlington (IA) Hawk Eye 20 Nov. 1/6: Hearing Tom, Dick and Harry each call for a ‘broiled owl’ he thought he’d try ‘owl.’.
1867		G.E. Clark Seven Years of a Sailor’s Life 161: How are you, Tom, Dick, and Harry?
1882		G.A. Sala in Living London (1883) June 222: We do not name a Derby ‘crack’ [...] or a new orchid after Tom, Dick or Harry.
1888		Report of the Proceedings of the Church Congress 460: A statutory council not of churchmen, but of Bill, Tom, and Harry, of Jews, Turks, and infidels.
1897		W. Sickert Speaker 3 Apr. 373: The standard of the election errs in being too low [...] they lightly take Tom, Dick and Harry for better or for worse, to the lasting detriment of what, after all, still ranks as a respectable house.
1909		J. Washburn Und. Sewer 275: Observe the hardship this girl must endure [...] she is at the mercy of Tom, Dick and Harry.
1914		M. Glass Abe And Mawruss 260: If you think we are going to work to hire a designer which he is getting fired by every John, Dick and Harry, you got another think coming.
1917		Wodehouse ‘The Mixer’ in Man with Two Left Feet 57: A dog [...] can have a good heart, without chumming with every Tom, Dick, and Harry he meets.
1928		L. Mackay My Oul’ Town 14: Dick, Tom, an’ Harry was welcome to sit there all day if they liked.
1928		M.C. Sharpe Chicago May (1929) 117: He apologized for believing every Tom, Dick, and Harry that maligned me.
1930		D. Ahearn Confessions of a Gunman 214: His wife was going for any Tom, Dick and Harry.
1936		(con. 1830s–60s) ‘Miles Franklin’ All That Swagger 262: Every Tom and Dick make there to camp.
c.1940–5		‘Myles na gCopaleen’ Best of Myles (1968) 221: With what three commonplace gentlemen did this attempt of his suggest he was confusing me? Tom, Dick and Harry.
1954		G. Lamming Emigrants (1980) 62: It won’ be long ’fore every Tom Dick an’ Harry can send his chil’.
1960		H. Pinter Caretaker Act II: I’d hear the bell, I’d go down there, open the door, who might be there, any Harry might be there.
1967		F. Sargeson Hangover 135: It’s not for every Tom Dick and Harry to suppose he’s marksman enough to engage in that shooting match.
1975		L. Rosten Dear ‘Herm’ 6: I do not go around handing out my cousin Leon’s telephone number to every Tom, Dick and Jerry.
1977		K. Gilbert Living Black 219: He can go to work same as me, you, and every Tom, Dick and Harry.
1980		M. Bail Homesickness (1999) 94: I don’t show this to every Tom, Dick and Harry.
1984		Partridge DSUE (8 edn) 1245/2: Tom, Dick and Harry. The common run of men (and women): coll. soon > S.E.: T., D., and H., app. not before ca. 1815, but Lindsay, in 1566, has Jack and Tom, Tom and Tib is frequent in C.17, Jack, Tom, Will, and Dick in 1604 (James I loquitur), Tom, Jack and Dick in ‘Water-Poet’ Taylor, 1622, Tom and Dick occurs in C.18, Tom, Dick, and Francis in Shakespeare (1596), Dick, Tom, and Jack in 1660 (A. Brome), Jack, Tom, and Harry ca. 1693 (T. Brown), and Tom, Jack, and Harry in 1865. F. & H.; OED; Apperson (above all) .
1991		(con. 1920s) O.D. Brooks Legs 1907: You wouldn’t rent to every Tom, Dick and Harry that comes along, now, would you?
2000		S. Varma Lament of Mohini 65: Any Tom-Dick-Harry will come along and criticize his art.
2012		Constitutionally Speaking (S. Afr.) 26 Oct. 🌐 Every Tom, Dick and Harry including the dead that have worken up from their graves were crying lack of leadership.