Genealogy / Looking for J.Kowalska & M. Usczyk. [3]

I am searching for my mother's cousin Johanna Kowalska last in Poznan & a foster sister Maria Uśczyk last in Swientochlowitz. My mother's name is Maria Cichon,born in Swientochlowitz in 1937. Please, if anyone knows this ladies write to me. I can correspond in german & english. Many thanks:-)