Trzybinski Szamotuly / Samter

I am looking for any children of the Trzybinski family from Szamotuly
Sylvester Trzybinski born about 1865 ,to parents Jozef Trzybinski (1835-1880) Regina Konieczna (1837-1896)
Married to Marianna Stroinska died 1943 in Samter/Szamotuly.
they had children

Maria Casimira (1895-1961) my great grandmother. Son to unknown fiance Wladyslav born about 1916. Married to Viktor Urbanski 1918
Jozef 1897-1974 Think married Jozefa? grave - http://polski-cmentarz.pl/szamotuly/gro ... =0&cinki=1
Helena 1898 - ? Think married Otto Pretzel?
Zofia 1901-194? think died WWII
Leon 1906-1906
Franciszka 1906-1975
Felicja 1909-1911

We thought there was a son Felix, but I can't find evidence of him. Is there anywhere to find if Jozef had a middle name Felix? I have a photo of his wedding. We were told Felix was a butcher, maybe it was Jozef was a butcher. Or maybe the father Sylvester was a butcher.
Is there somewhere I can search for Wladyslav son of Casimira if she was not married?
We have a family photo with no names, so trying to find all the records to help know who is in the picture
Trzybinski is a very hard name to find.
Does anyone know where the best place to find Szamotuly records is?

Any help would be wonderful.
I have just returned from visiting Poland and Szamotuly and I would love to find what happened to my family.
Thank you for any suggestions.