What children did Marie antoinette have when she died and what were their ages?

Answer 1

Only 2 of her children were alive when she died in 1793:

Marie-Thérèse-Charlotte - December 19, 1778 - October 19, 1851
Louis-Charles, Duke of Normandy - March 27, 1785 - June 8, 1795
He became Louis XVII when his father died.

Her other 2 children died before her:

Louis-Joseph, Dauphin - October 22, 1781–June 4, 1789
Sophie-Béatrix - July 9, 1786 - June 19, 1787

Answer 2

Her son died while still very young. Her daughter grew to adulthood and married. I think she married a second cousin on her father's side. She also wrote an account of her parents and their time spent in prison.