What was the middle name of US President Rutherford Hayes?

Rutherford Birchard Hayes was the 19th President of the United States (1877–81). He was born in Delaware, Ohio, on October 4, 1822, the son of Rutherford Hayes, Jr. and Sophia Birchard. His grandfather and father were also named "Rutherford Hayes", but neither (yes, they were Sr. and Jr.) had a middle name.