It sounds like you & I are cousins. I am a Son of your Father's brother Stanley, from what I've recently learned would have been his 3rd marriage, where he had at sometime mysteriously removed the "z" and was identifying himself as Ejak, which therefore is my name. (see my 2004 post)
My research initially started to learn the true root of the Ejzak name, as there was controversy to regions of Poland v what was Prussa, to potentially Russia? Definitively, I still don't know, but certainly there's a big cultural difference.
In the meantime, it also became interesting for me to learn more of exactly when his name change occurred and why, other than speculation.
If you may have comment or info you'd like to share, feel free to contact me at
jejak@comcast.netThe world is getting amazingly smaller! Jim