Although the movie was highly entertaining and showcased the actors musical
talents, it was not based strictly to the real life Von Trapp family. Maria was actually somewhat imbalanced and would erupt into fits of rage. They would would pass shortly and she would return to her kind normalcy. All of the Von Trapp Family children had different names, sexes and ages. The Von Trapp Family didn't escape over the swiss alps on foot either. They left by train and told everyone they were coming to America to sing. Here is a picture of Maria when they entered the U.S. The Von Trapp family will live in my mind as the feature film depicts, but it's interesting to know that there were a real Von Trapp Family (even if their dad didn't star in a Star Trek movie).
The Sound of Music (Two-Disc 40th Anniversary Special Edition)