Województwo mazowieckie · 38 różnych nazwisk.
| Lp. | Nazwisko | Liczba osób | |
|---|---|---|---|
| 1 | Krętkowski | 25 | |
| 2 | Koziatek | 17 | |
| 3 | Kraśniewski | 17 | |
| 4 | Szymański | 17 | |
| 5 | Antochów | 8 | |
| 6 | Biegalski | 8 | |
| 7 | Borowiec | 8 | |
| 8 | Ciężki | 8 | |
| 9 | Daszczyński | 8 | |
| 10 | Gajewski | 8 | |
| 11 | Kamiński | 8 | |
| 12 | Karasiewicz | 8 | |
| 13 | Konopa | 8 | |
| 14 | Kruszewski | 8 | |
| 15 | Krysiński | 8 | |
| 16 | Kur | 8 | |
| 17 | Laskowski | 8 | |
| 18 | Lemanowicz | 8 | |
| 19 | Linke | 8 | |
| 20 | Lubiński | 8 | |
| 21 | Marciniak | 8 | |
| 22 | Margiel | 8 | |
| 23 | Nawotczyński | 8 | |
| 24 | Oczkowski | 8 | |
| 25 | Olszewski | 8 | |
| 26 | Pątkowski | 8 | |
| 27 | Pikus | 8 | |
| 28 | Ratkowski | 8 | |
| 29 | Roman | 8 | |
| 30 | Rostkowski | 8 | |
| 31 | Rulka | 8 | |
| 32 | Siemianowski | 8 | |
| 33 | Śmigielski | 8 | |
| 34 | Szulc | 8 | |
| 35 | Tumiński | 8 | |
| 36 | Zawadka | 8 | |
| 37 | Zbyszyński | 8 | |
| 38 | Ziętara | 8 |
Liczby są szacunkowe - informacje o danych.