[Ger-Poland-Volhynia] FREIGANG family

[Tammy Jochman]

Hello, 

Does anyone know the ancestry of  Rev. Gustav L. Freigang (1867-1967)? 
He served the Baptist Church in Kolowert 1907-1909. In 1913, he immigrated to the US. He served as a pastor in Turtle Lake, North Dakota and Tacoma, Washington. 
His 1st wife was Johanna "Caroline" Zwar and later he married Minnie Bunkowski/ Bunkovsky. 

My grandmother's 95yr old cousin believes she is Gustav's grandniece. She remembers meeting him once. 
Her paternal grandmother is  Juliane/ Julia Kadak nee Freigang. Julia emmigrated to America at the age of 63 in March 1926. 
On the passenger list, Julia listed a sister, Ernestine (Freigang) Zurowski of Neudorf, as her closest relative. 

Thank You for any help you can give regarding the ancestry of Rev. Gustave Freigang. 

Tammy Jochman