Genealogy / Addresses in Łomża [5]

I have two old envelopes with relatives addresses on them. I looked at a few websites to see how to read these but can't figure out the Nad or Zam. Is there some way to convert to a present day address and find on a map? Curious to see where these are. The addresses are below.

Nad: Person's Name
18-407 Podgórze
zam. Podgórze Nr 81
woj. £omża

Nad. Person's Name
18-400 £omża
Podgórze
Woj. £omża

Also, could anyone be of any help in identifying Catholic Churches near these addresses? Would be interested in information on Catholic Churches in the area from 1890 to 1910 time period.

Genealogy / Jackowski, Wieckowski - Ancestors Search in Mława Poland [19]

I am interested in information on my ancestors that came from M£AWA around 1910. My grandfather's name was JO-EF JACKOWSKI. My great grandparents names are JAKUB AND ELENORA JACKOWSKI. Their Ellis Island Records indicate my grandfather came from M£AWA. We have other records indicating the same for my great-grandparents, however their Ellis Island Records indicate they were from Popowka.

I am seeking:

1. Any information on JACKOWSKI family that may relate to the above.

2. Information on "POPOWKA". I searched and could not find anything like this in Poland. Again, this is the location on the Ellis Island Records, but we have reason to believe they came from M£AWA.

3. Information on Catholic Churches or Cemetetaries that were in the M£AWA area around 1860 to 1910.

4. Points of interest in M£AWA that may be of interest if one was to visit M£AWA.

Thank You

JoeJazz