I occasionally encounter Germans who seem a bit shocked when I, or some other American, confidently assume that an American named 'Goldstein' or 'Feldman' or 'Rosenthal' is Jewish. (Generally, these are Germans who haven't spent much time in the USA). To them, these just seem like unusual German names, meaning the people who carry them could just as easily be Protestant or Catholic. I then explain that -- all stereotyping aside, not that it matters, etc. etc. -- the chance that an American with one of these names isn't Jewish is vanishingly small.
That's because these are names were imposed on Ashkenazi Jewish communities by German-speaking bureaucrats in the 18th and 19th centuries. Over at Slate, Bennett Muraskin has an article on the eubject:
Some German-speaking Jews took last names as early as the 17th century, but the overwhelming majority of Jews lived in Eastern Europe and did not take last names until compelled to do so. The process began in the Austro-Hungarian Empire in 1787 and ended in Czarist Russia in 1844.
In attempting to build modern nation-states, the authorities insisted that Jews take last names so that they could be taxed, drafted, and educated (in that order of importance).
These Jews then emigrated to the United States, carrying their names with them. For obvious reasons, very few Jews with these names are left in Germany. Muraskin provides a fairly exhaustive list of the names, many of which are instantly recognizable to any German-speaker. One of them many life-changing benefits of learning German is the ability to impress your Jewish -- and even Gentile! -- friends by telling them what their names mean. Muraskin provides a list, allowing you non-speakers to play yourself:
Ackerman — plowman; Baker/Boker — baker; Blecher — tinsmith; Fleisher/Fleishman/Katzoff/Metger — butcher; Cooperman — coppersmith; Drucker — printer; Einstein — mason; Farber — painter/dyer; Feinstein — jeweler; Fisher — fisherman; Forman — driver/teamster; Garber/Gerber — tanner; Glazer/Glass/Sklar — glazier; Goldstein — goldsmith; Graber — engraver; Kastner — cabinetmaker; Kunstler — artist; Kramer — storekeeper; Miller — miller; Nagler — nailmaker; Plotnick — carpenter; Sandler/Shuster — shoemaker; Schmidt/Kovalsky — blacksmith; Shnitzer — carver; Silverstein — jeweler; Spielman — player (musician?); Stein/Steiner/Stone — jeweler; Wasserman — water carrier.
Garfinkel/Garfunkel — diamond dealer; Holzman/Holtz/Waldman — timber dealer; Kaufman — merchant; Rokeach — spice merchant; Salzman — salt merchant; Seid/Seidman—silk merchant; Tabachnik — snuff seller; Tuchman — cloth merchant; Wachsman — wax dealer; Wechsler/Halphan — money changer; Wollman — wool merchant; Zucker/Zuckerman — sugar merchant.
Related to tailoring
Kravitz/Portnoy/Schneider/Snyder — tailor; Nadelman/Nudelman — also tailor, but from "needle"; Sher/Sherman — also tailor, but from "scissors" or "shears"; Presser/Pressman — clothing presser; Futterman/Kirshner/Kushner/Peltz — furrier; Weber — weaver.
Alter/Alterman — old; Dreyfus—three legged, perhaps referring to someone who walked with a cane; Erlich — honest; Frum — devout ; Gottleib — God lover, perhaps referring to someone very devout; Geller/Gelber — yellow, perhaps referring to someone with blond hair; Gross/Grossman — big; Gruber — coarse or vulgar; Feifer/Pfeifer — whistler; Fried/Friedman—happy; Hoch/Hochman/Langer/Langerman — tall; Klein/Kleinman — small; Koenig — king, perhaps someone who was chosen as a “Purim King,” in reality a poor wretch; Krauss — curly, as in curly hair; Kurtz/Kurtzman — short; Reich/Reichman — rich; Reisser — giant; Roth/Rothman — red head; Roth/Rothbard — red beard; Shein/Schoen/Schoenman — pretty, handsome; Schwartz/Shwartzman/Charney — black hair or dark complexion; Scharf/Scharfman — sharp, i.e intelligent; Stark — strong, from the Yiddish shtark ; Springer — lively person, from the Yiddish springen for jump.
When Jews in the Austro-Hungarian Empire were required to assume last names, some chose the nicest ones they could think of and may have been charged a registration fee by the authorities. According to the YIVO Encyclopedia, "The resulting names often are associated with nature and beauty. It is very plausible that the choices were influenced by the general romantic tendencies of German culture at that time." These names include: Applebaum — apple tree; Birnbaum — pear tree; Buchsbaum — box tree; Kestenbaum — chestnut tree; Kirschenbaum — cherry tree; Mandelbaum — almond tree; Nussbaum — nut tree; Tannenbaum — fir tree; Teitelbaum — palm tree.
Other names, chosen or purchased, were combinations with these roots:Blumen (flower), Fein (fine), Gold, Green, Lowen (lion), Rosen (rose), Schoen/Schein (pretty) — combined with berg (hill or mountain), thal (valley), bloom (flower), zweig (wreath), blatt (leaf), vald or wald (woods), feld (field).
Miscellaneous other names included Diamond; Glick/Gluck — luck; Hoffman — hopeful; Fried/Friedman — happiness; Lieber/Lieberman — lover.