Andre Stein (1776-1842), along with his sister Nanette Stein (1769-1833), continued the tradition of their father, the famous piano maker Johann Stein. Together they ran his workshop from 1792-1794 in Augsburg, Germany. When Nanette married, they moved to Vienna and worked together until 1802 when they each established their own workshops. Nanette’s husband was Johann Andreas Streicher and so pianos made after establishing her own workshop bear the name Streicher. Mozart was known to have played a Stein piano and Beethoven was very close to the Stein family.
Literature references: Clinkscale, Martha Novak. Makers of the Piano: 1700-1820. Vol. 1, Oxford University Press, 2006.