Antonina Golka
I believe this to be Antonina Golka.
The only notation on this picture is a number from the developing company. The number matches the next picture of her husband, Karl Golka. On the back of Karl's picture is the date July 11, 1938. There's no name to identify either picture. This is all on assumption and comparison to other pictures.
According to the 1940 Immigration application for a "green card" Antonina had several aliases:
Antonina Gesicka (interpreted as Kesicka, and later on became Kesicki)
Antonia Michalski (1st marriage and the surname of Helen and Harriet, her daughters from the first marriage)
Antonina Golka (2nd marriage to Karl Golka)
And then there was the name she used when she traveled to the United States:
Karl Golka 
There's only the date on the back of this picture: July 11, 1938.
It appears to be an older man and since this picture was in the same envelope as Antonina's picture, I can only assume that this must be her husband, Karl Golka (Karl was also spelled with a "C").
There's no identity to the little girl. Since these pictures were in the same envelope with other 1938 pictures, they may all have been taken in New Jersey -- probably the town of Linden.
Helen Michalski-Ruminski?
What a beautiful picture of a mother and child. Could this be Helena (Helen) Michalska(i) - aka Helen Ruminska(i) with her first born child? The back of the picture has only a date:
May 1924 Could this baby be Frank Ruminski?
Helen is the daughter of Antonina Golka. Also, Helen is the older sister to Harriet Michalska(i). In 1904 Antonina brought Helen (age 11) and Harriet (age 6) to the United States from Lipno (Polka Providence) Poland/Russia
John Romanoski?
The Romanoska(i) family were talented musicians. They had a Polka band and played many a "gig" throughout the Linden, New Jersey area.
John Romanoski purchased the Linden Accordian Shop and not long after renamed it Roman Accordian Shop. The Romanoski name was shortened to Roman. The back of this picture had only the year:
1938
Who are these people?

Okay, so these 2 pictures keep me guessing. Since I found them in the same envelope as the 1938 & 1945-46 pictures, I'm going to guess it's either the Ruminski family or Romanoski family and that the location is in New Jersey. The date on the back of both pictures is
April 1, 1945.
Helen & Private George Jindrak, Jr.
Here's the first of many, many pictures of Helen! Helen was the best communicator through letters that gives a great deal of information about the Michalski/ Romanoski/ Lasicki side of the family. The back of the picture has Helen and George's name with the date:
October 9, 1943
Who is this?
I think it's too early to be Florence with 2 children. Could this be Harriet Sobozenski-Tokar with her 2 children Richard and Frankie?
Hmmm....
This picture was taken March of 1945.
Florence with her Father 
The back of this picture is identified as Florence with her father, Kazimir Ruminski.
The date is April 21, 1946. Probably very close to the Easter season. Florence is the daughter of Helen Ruminski and Kazimir Ruminski. Florence has a brother, Frank Ruminski and sister, Helen (DeNault).
Florence with Great Grandmother
This picture is identified as Florence with her great grandmother. I believe that this might be Antonina Golka with Florence. The picture is dated April 21, 1946