bagno from Gostynin

I have totally drawn a blank with my relative chaskel (katskel) bagno
Born
1861 - Gostyń, gostyński, wielkopolskie, Poland
Death
Apr 6 1933 - Paris, Ville-de-Paris, Francia
Father
Leib Bagno
Wife
Feiga Ida Bagno (born Moskal)
Children
Tauba Rachel Bagno, Guittel Khavous (born Bagno), Marks 'max' Levy (Born Bagno), Szlama Salomon Bagno, Abram Albert Bagno

I cannot find his father or mother details or those of his wife. I also cannot find any naturalisation document from polish to French- and wondered whether he died in Paris still as a polish citizen.

Can anyone help please?

with thanks
Gabrielle