I did not put the information on the internet tree, but there exist five books written by Gustav Alfons Matt on the history of the Matt family. The information from this book is quite reliable. I checked some dates myself at the archive at Vaduz. Could find some matching information in older notes of my family and checkes some information from the just last year printed family book of Mauren/Liechtenstein.
If you want to check some information or change them please write to me.
I have also information on Marxer family - related to Matt family.