Mikalojus Radvila or Mikolaj I nicknamed the Old was a Lithuanian noble. He was known after a patronym Radvilaitis, made of his father's name Radvila, which in turn became a family name of his heirs, Radvilos, which later polonised as Radziwiłł. Wikipedia
Born: 1440
Died: July 16, 1509 (age 69 years)
Great-grandparent: Sirputis
Parents: Radvila Astikas
Children: Mikołaj II Radziwiłł, Jerzy Radziwiłł, Anna Radziwiłł, and more
Great grandchildren: Mikołaj Krzysztof Radziwiłł, Krzysztof Mikołaj Radziwiłł, Mikołaj VII Radziwiłł, and more
Grandchildren: Mikołaj Radziwiłł, Barbara Radziwiłł, Jan Radziwiłł, and more