Van Leer was born on October 15, 1865[1] in Nashville, Tennessee, to Samuel Van Leer and Alice Clark.[2] He graduated with a degree in law from Vanderbilt University in 1895.[3] He married Harriet Taylor Draper in Washington, Kansas on August 23, 1905.[4] He was a member of the influential Van Leer family and his great-grandfather Samuel Van Leer was a captain in the Continental Army during the American Revolutionary War.[3] Both his sons Anthony and Carlos served as military officers. His son Anthony Wayne Van Leer also had a long prominent military career as an officer in the Navy. After graduating from Dartmouth as an engineer, Anthony served during World War II and later worked for the White House on various engineering projects.[5][3][6] His son Carlos graduated from Yale University and served as an officer during multiple wars.[7]