Erhardt Oscar Kraus

Hey everyone. I am new to this. My dad was Erhardt Oscar Kraus, he was born in Keil (West) Germany. His father was Oskar Kraus, and his mother was Charlotte Wrangle. We don't know too much of the family history, I know he had a couple Uncles that Left Germany, one Came to Canada, and a couple to the United States. There was a huge family fight among my Grandfather and his Brothers at the time of the WWII. I was wondering if anyone else has traced or tried to trace this branch of the Kraus family?
I have found another Kraus lady in Prince Albert, Sk. and I believe that her Dad's Aunt and Uncle (that raised him here in Canada) May have been one of my Dad's Uncle's however neither of us have much family history, though if we were to base it on looks I would definately say we're related.