What is William McKinley's full name?

Answer 1

William McKinley (Jr.) was not given a middle name.

I read an interview that Alice Roosevelt Longworth (Teddy Roosevelt's daughter) gave and she kept referring to President McKinley as "William F. McKinley" , however, it didn't give an indication what the middle name actually was.

Answer 2

William McKinley, Jr. was the full name of President McKinley. His father died before he was President, so the Jr. became irrelevant.

Answer 3

He did not have a middle name. He was given his father's name and was officially William McKinley Jr. until his father died

Answer 4

Willaim McKinley Jr.