were mostly Silesians, where German settlers lived for centuries.
I have made detailed research on Silesian genetics recently.
Here are haplogroup frequencies in Silesia before the World Wars (sample size = 100):
Upper Silesia (sample size = 48):
Haplo R1a --- 63% (30 men)
Haplo R1b --- 10% (5 men)
Haplo I1 ----- 6% (3 men)
Haplo E1b ---- 6% (3 men)
Haplo J2 ----- 4% (2 men)
Haplo N1c --- 4% (2 men)
Haplo J1 ---- 2% (1 man)
Haplo G ----- 2% (1 man)
Lower Silesia (sample size = 48):
Haplo R1a --- 48% (23 men)
Haplo I1 ----- 19% (9 men)
Haplo R1b --- 10% (5 men)
Haplo G ----- 8% (4 men)
Haplo J2 ----- 4% (2 men)
Haplo I2a ---- 2% (1 man)
Haplo E1b ---- 2% (1 man)
Haplo N1c --- 2% (1 man)
Haplo J1 ---- 2% (1 man)
Haplo T ----- 2% (1 man)
Entire Silesia (sample size = 100):
Haplo R1a --- 54% (54 men)
Haplo I1 ----- 13% (13 men)
Haplo R1b --- 11% (11 men)
Haplo J2 ----- 5% (5 men)
Haplo G ----- 5% (5 men)
Haplo E1b ---- 4% (4 men)
Haplo N1c --- 3% (3 men)
Haplo J1 ---- 2% (2 men)
Haplo I2a --- 1% (1 man)
Haplo Q ----- 1% (1 man)
Haplo T ----- 1% (1 man)
Surnames, places of birth, years of birth:
kit # - place of birth, SURNAME (subclade); all of these persons were born before WW2:
Haplo I1 - 13 / 100:
kit #372952 - Silesia, RAUTENBERG (M253+)
kit #E14316 - Żagań, VON NAUMANN (Z58+)
kit #N11115 - Stary Kisielin/Zielona Góra, LIEHR (Z58+)
kit #468007 - Boronów, BULLA (S2077/S2078+)
kit #91645 - Dąbrówka Dolna, WELNA (Z63+)
kit #119162 - Kobyla Góra, MAGNUSKI (L1237+)
kit #188658 - Pietrzykowice, BIALEK (S2078+)
kit #228663 - Karvina, KOPEL (Z140+)
kit #268090 - Rokliny, FRANKE (M253+)
kit #115240 - Stobrawa, DEUTSCHER (Z2336/L22+)
kit #N37278 - Wrocław, DEMSKE (M253+)
kit #167103 - Sośnicowice/Tarnowskie Góry, BOTUR (Z63+)
kit #155178 - Kłodzko, ROSENBERGER (Z140+)
Haplo R1b - 11 / 100:
kit #227479 - Cieszyn, FIEDLER (M269+)
kit #E1877 - Lower Silesia, QUADE (M269+)
kit #E2541 - Ludwigsthal, SCHIRM (U106, S10185+)
kit #132073 - Kotulin Mały, KORUS (M269+)
kit #B4978 - Ostrava, SELIGA (U152, DF103+)
kit #422423 - Oława, KARPEL (U152, Z49+)
kit #N89895 - Żagań, SCHULZ (U106+)
kit #N114363 - Nowa Sól, SCHMIDT (P312, DF99+)
kit #E4911, E14624 - Kolsko, LEFEBER (P312, L21+)
kit #N11619 - Okunin, SCHILLING (M269+)
kit #176123 - Gliwice, KONIECZNY (Z2103, BY593+)
Haplo J2 - 5 / 100:
kit #B27771 - Suszec, JURECZKO (Z631+)
kit #278599 - Wrocław, GABEL (M92+)
kit #N27660 - Zabrze, NN (M172+)
kit #N45394 - Silesia, GILL (FGC21360+)
kit #66138 - Wrocław, ZWIEFKA (L283+)
Haplo E1b - 4 / 100:
kit #E18170 - Sternalice, STEINERT (PF1975+)
kit #83418 - Racibórz, FIEGLER (V13+)
kit #233387 - Krasne Pole (Ostrava), HONHEISER (V13+)
kit #155147 - Lubin, SEIFLEIN (V13+)
Haplo G2a - 3 / 100:
kit #285720 - Gliwice, BEIDEL (Y8903+)
kit #231079 - Uszyce, KOWALSKI (P15+)
kit #265686 - Lutomia Górna, POHL (L13/L78+)
Haplo N1c - 3 / 100:
kit #N49541 - Rydułtowy, MEISEL (L1025+)
kit #N107445 - Złotoryja, NOWAK (Y4706+)
kit #E11197 - Górki, BLACH (L1025+)
Haplo G2b - 2 / 100:
kit #123331 - Bolesławiec, BRODA, (M377+)
kit #72341 - Podkamień, ADER (M377+)
Haplo J1 - 2 / 100:
kit #77418 - Praszka, GUTFRAJND (Z18271+)
kit #N13360 - Pszczyna, WARZECHA (P58+)
Haplo I2a - 1 / 100:
kit #300972 - Laskówka, SCHINDLER (CTS5966+)
Haplo T - 1 / 100:
kit #161332 - Zielona Góra, SCHÜTZ (P322+)
Haplo Q - 1 / 100:
kit #89372 - Mikołów, DE KRUPPA (L275+)
===========================
===========================
Haplo R1a - 54 / 100:
Clade R1a-M417+:
kit #40132 - Zielona Góra, WEDERICH (M417+)
Clade R1a-L664:
kit #277963 - Siemianowice Śląskie, KORFANTY (L644+)
Clade R1a-Z280:
kit #156577 - Stronie Śląskie, SZCZEPANEK (M417+, Z280?)
Subclade Z92:
kit #192545 - Głubczyce, SALZMANN (Z280>Z92+)
Subclade CTS1211 (M558):
kit #164946 - Lubliniec, SCHEMBOR (Z280>CTS1211?)
kit #249444 - Błotnica Strzelecka, MAXELON (Z280>CTS1211?)
YP343:
kit #N38418 - Krzyżowa, BULAWA (Z280>CTS1211>YP343*)
YP380:
kit #N116699 - Ochaby, STANIEK (Z280>CTS1211>YP343>YP340>YP371>YP372>YP380*)
kit #295227 - Warszowice, LASSEK (Z280>CTS1211>YP343>YP340>YP371>YP372>YP380?)
P278.2:
kit #E5412 - Opole, KLEEMANN (Z280>CTS1211>YP343>YP340>P278.2+)
kit #N35951 - Ostrawa, NN (Z280>CTS1211>YP343>YP340>P278.2+)
kit #163780 - Niewiesze, KOCUR (Z280>CTS1211>YP343>YP340>P278.2+)
CTS3402>YP237:
kit #465642 - Bładnice Górne, GAZDA (Z280, CTS3402>YP237+)
kit #161130 - Wrocław, PFEILER (Z280, CTS3402>YP237>YP235?)
kit #302244 - Frydek-Mistek, NOWAK (Z280, CTS3402>YP237>YP951, YP1018+)
CTS3402>Y33:
kit #210950 - Legnica, HAMANN (Z280, CTS3402>Y33, YP4335*)
kit #N17626 - Katowice, SOBALLA (Z280, CTS3402>Y33>CTS8816>Y2898>Y2902+)
kit #464408 - Osina Mała, KUBE (Z280, CTS3402>Y33>CTS8816>Y2898>Y2902+)
S18681:
kit #E8695 - Wrocław, MASUR (Z280, CTS3402>Y33>CTS8816>S18681)
kit #N156262 - Wrocław, WIANCKO (Z280, CTS3402>Y33>CTS8816>S18681, YP314+)
kit #329518 - Brody (Pförten), KAKOSCHKE (Z280, CTS3402>Y33>CTS8816>S18681, YP314>YP1409+)
Clade R1a-M458:
Subclade L260:
kit #188725 - Mysłowice, PATALONG (M458, L260?)
kit #349840 - Katowice, ROSTEK (M458, L260?)
kit #172283 - Wałbrzych, DINTER (M458, L260?)
kit #124617 - Oleśnica, LASSOTA (M458, L260?)
kit #N33335 - Budziska, GRZESIK (M458, L260?)
kit #N18946 - Żywiec, TOMASZEK (M458, L260?)
kit #N13715 - Komprachcice, SAKRY (M458, L260+)
kit #363910 - Międzyrzecze, ROLKA (M458, L260+)
kit #E1842 - Stare Karmonki, FREYER (M458, L260+)
kit #N3865 - Laskowice, PACH (M458, L260+)
kit #114248 - Srebrna Góra, KRUSZKA (M458, L260+)
kit #E4579 - Czerwona Woda, NN (M458, L260+)
kit #173783 - Zielona Góra, VOGT (M458, L260+)
YP1337:
kit #288504 - Rostkowice, STRZODA (M458, L260>YP1337+)
YP254:
kit #N111740 - Kałki, SCHULZE (M458, L260, YP256>YP254?)
kit #53667 - Wilamowice, SCHNEIDER (M458, L260, YP254+)
kit #376660 - Brzęczkowice, CHECHELSKI (M458, L260, YP254>YP414+)
kit #154913 - Niemodlin, HANNAK (M458, L260, YP254>YP414>YP610+)
Y2905:
kit #439329 - Mikołów, SZKOWRON (M458, L260, YP254>Y2905+)
kit #338484 - Świniary, MIRKE (M458, L260, YP254>Y2905+)
kit #260299 - Głubczyce, BERNATEK (M458, L260, YP254>Y2905>YP1364+)
kit #329542 - Wrocław, WARKUS (M458, L260, YP254>Y2905>YP1364+)
kit #N77026 - Panki, KONARSKI (M458, L260, YP254>Y2905>YP1364>YP3927+)
Subclade L1029:
kit #178329 - Chorzów, BENTKOWSKI (M458, CTS11962?, L1029?)
kit #102574 - Wałbrzych, SCHOBER (M458, CTS11962?, L1029?)
kit #373829 - Głubczyce, LEX (M458, CTS11962>L1029+)
kit #E11879 - Raszowa, GONDRO (M458, CTS11962>L1029+)
kit #271280 - Milicz, SCHWABE (M458, CTS11962>L1029+)
kit #199575 - Wrocław, Piotr WŁOSTOWIC (M458, CTS11962>L1029>YP593+)
kit #97621 - Wrocław, JUNG (M458, CTS11962>L1029>YP263>Y2921+)
Clade R1a-Z93(xCTS6):
kit #E7096 - Rościsławice, BAUM (Z93, Z94-)
kit #232033 - Krapkowice, SCHARON (Z93, Z2124>Z2123, Y934*)
Subclade R1a-CTS6: (= Ashkenazi Jewish subclade)
kit #N103033 - Silesia, CHRISTMANN (Z93, Z2124>Z2122, CTS6+)
===============================
===============================
Map (98 samples with exact places known):
https://s32.postimg.org/6op30x89h/Lower_and_Upper.png
=====================
Structure of R1a haplogroup in Silesia:
M417 - 54/54
---L664 - 1/54
---Z645 - 52/54
------Z93 - 3/52
------Z283 - 49/52
---------Z280 - 19/49
------------Z92 - 1/19
------------M558 - 17/19
---------------CTS3402 - 9/17
---------M458 - 30/48
------------L260 - 23/30
------------CTS11962 - 7/30