I have found a type written research/history compilation of the Bradt Families of New York from 1938 compiled by Edith VanHeusen Becker from Broadalbin New York. The compilation starts with Albert Andriese Brat and Arent Andriese Brat arriving in New Amsterdam in 1637. It continues with them moving to the Albany Area. there seems to be over 100 pages of information. If this may aid in your research contact me.