Województwo mazowieckie · 56 różnych nazwisk.
| Lp. | Nazwisko | Liczba osób | |
|---|---|---|---|
| 1 | Pietrewicz | 26 | |
| 2 | Dan | 12 | |
| 3 | Pilichowicz | 12 | |
| 4 | Sikorski | 12 | |
| 5 | Zasada | 12 | |
| 6 | Borowiński | 6 | |
| 7 | Budnicki | 6 | |
| 8 | Ciechanowicz | 6 | |
| 9 | Cieślak | 6 | |
| 10 | Daniłowicz | 6 | |
| 11 | Dermont | 6 | |
| 12 | Durma | 6 | |
| 13 | Filiński | 6 | |
| 14 | Gątarski | 6 | |
| 15 | Janiszewski | 6 | |
| 16 | Jaraszek | 6 | |
| 17 | Jurewicz | 6 | |
| 18 | Kelman | 6 | |
| 19 | Keplin | 6 | |
| 20 | Kowalczyk | 6 | |
| 21 | Kozłowski | 6 | |
| 22 | Krzykwa | 6 | |
| 23 | Lawendowski | 6 | |
| 24 | Ławrynowicz | 6 | |
| 25 | Lewandowski | 6 | |
| 26 | Łukowski | 6 | |
| 27 | Magierski | 6 | |
| 28 | Marszałek | 6 | |
| 29 | Masiewicz | 6 | |
| 30 | Nyckowski | 6 | |
| 31 | Radzki | 6 | |
| 32 | Sejda | 6 | |
| 33 | Sitko | 6 | |
| 34 | Smokowski | 6 | |
| 35 | Staniszewski | 6 | |
| 36 | Szwech | 6 | |
| 37 | Tyrajski | 6 | |
| 38 | Życzkowski | 6 | |
| 39 | Ciurlik | 1 | |
| 40 | Dolna | 1 | |
| 41 | Dziedzianowicz | 1 | |
| 42 | Figurski | 1 | |
| 43 | Frochlich | 1 | |
| 44 | Ginda | 1 | |
| 45 | Jaworski | 1 | |
| 46 | Murawski | 1 | |
| 47 | Piotrowski | 1 | |
| 48 | Pogoda | 1 | |
| 49 | Preś | 1 | |
| 50 | Skrobiszewski | 1 |
Liczby są szacunkowe - informacje o danych.