Hi, Deb,
We have a record of this family, which is documented in the "Descendants of Albert and Arent Andriessen Bradt" by Cynthia Brott Biasca, with additional information in the first supplement to that book, based on research by both Cynthia and Joan Bradt Wood. Your family descends from the elder brother, Albert. George was married to Catherine Hoover, and his parents were William Bradt and Elizabeth Austin - just for starters!

Email me for more detail on your complete line and so that we can exchange information. All that we have on your great grandfather comes from the descendants of one of his brothers, so we will be very happy to update the family records!

Laurie Grimes
Bradt Family Society Lineage Researcher/Genealogist