Hi, been dabbling in researching the family name...I do know every Gundaker here was fathered by Joseph Gundaker..The reason being Francis Gundaker gave up his sovereign to his brother, Joseph, Because Francis went with his buddy, Leopold 1st to fight the war they eventually did lose..However Francis did go on to France where he was the first person in the world to open a Bank..A Financial establishment which changed humanity..Pretty cool...Then I research further..Where do you fit in at?..I am named after my great aunt Catherine Irene Gundaker from Phila.Pa. I went back as far as 1300