Nothing! He didn't have a middle name, per se. According to Truman himself, the initial was a way to honor both his grandfathers, Anderson Shipp Truman and Solomon Young.
Truman's middle name is just "S". This letter was chosen to honor both of his grandfathers, Anderson Shippe Truman and Solomon Young,
Harry Truman. The S. didn't stand for anything.
Harry S Truman
Harry S. Truman
"S" in Harry S. Truman doesn't actually stand for anything. His parents couldn't decide on a middle name, so they just went with the letter "S" as a placeholder. So, it's just Harry S. Truman, no fancy middle name to decode.
Harry S. Truman
Harry S. Truman was born on May 8, 1884.
Harry S Truman. Please note that there is no period after the S in his name, because it isn't an initial letter abbreviation; the "S" doesn't stand for anything.
He was born Harry S Truman
Harry Truman is not on money
Harry S Truman was US president at the end of World War 2 in 1945.Harry Truman
Harry S. Truman Harry S. Truman