WOW you have quite a story there - phenomenal! The truth is stranger than fiction. This would make an epic movie (your dad's horror story) - I hope it has a happy ending (hence, you were born), but apparently you will never know. And that too is the kind of ending that made me stop reading The New Yorker short stories: all the fiction ended with the Not Knowing. Wow again, wow, thank you for sharing!
And yes, I wrote about Prussia in that ill-fated NaNoWriMo novel, but I kept wondering if it was ok to refer to the doctor as a German. I decided to play it safe and make him Bavarian. Germany as such didn't exist until the late 1800s. Now I'm wondering if Russian is your native language? You probably know @mariannewest's is German (and I might hazard a guess you could have grown up in Germany). I would love to hear what became of your father. By now, he'd be a hundred years old, wouldn't he? If he's alive...the way you wrote that final line is spectacular, and I hope you'll work this into fiction one day soon.
More! More! More! (I know, I know, it's deeply personal, hence that disclaimer that it's "only fiction.") :) I blogged about that a few months ago...