The Great Thaddeus Kosciuszko

I am THE GREAT Thaddeus Kosciuszko! I was born in Siechnowica, Poland (which is now known as Belarus, Poland) on February 12, 1746.
My brother Joseph would frivolously spend his money. I also had one sister, Anna KosciuszkoEstko who at one point married a man named Piotr.
When I was twelve my father died. Because of his death I lived on a small part of our estate that I inherited because it was mortgaged.