Family memories fade! Pictures help. Unfortunately, a picture alone will be useless in a few decades.
When you take a family photo it’s important to describe who’s who…in writing…preferably on the back of the photo.
My father came from Poland during the 1930s. Before he left Europe this family photo was taken. All except two of the 
people in the family were victims of Nazi execution. My father and his brother were the only ones to survive. Incidentally, my father is #9. The problem is that this is the only photo that survived. Unfortunately, the paper that described who was who has been lost…forever. Writing a caption is one of the best ways of preserving your family heritage.
Write captions…and save your family!