Hitler's Family Tree
Adolf Hitler's family tree is complicated. Below, you will notice that the last name "Hitler" had many variations and were often used almost interchangeably. Some of the common variances were Hitler, Hiedler, Hüttler, Hytler, and Hittler. Alois Schicklgruber did change his name on January 7, 1877 to "Hitler," which was the only form of the last name that his son, Adolf, used.
The family tree is filled with multiple marriages. Look carefully at the marriage dates and the birth dates of their children. Many children were born illegitimate or born only a couple months after marriage. Though the graph shows Johann Georg Hiedler as Alois Schicklgruber's father, this is a contested issue.
Also, Alois Schicklgruber's first wife has not been included. He married Anna Glassl-Hörer (1823-1883) in October 1873. Anna became an invalid soon after the marriage, in 1880 she filed for a separation, and she died three years later. Alois and Anna had no children together.
Note: I was surprised while researching for this information that many researchers do not agree on birth or death dates. I have done my best to include what seemed the most accurate dates.