The family member Theo van died at the age of 33. Here is all you want to know, and more!
Biography - A Short Wiki
Art dealer most famous for being the younger brother of world-renowned impressionist painter Vincent van Gogh. His financial support of his brother’s painting career allowed Vincent to become one of the most beloved painters of his era.
He married a girl named Johanna in April 1889. His great-grandson, also named Theo van Gogh, is a famous film director.