Hank is not short for any name. Hank is a German name meaning "Ruler of Home".
Hank Blalock's birth name is Hank Joe Blalock.
Hank Williams or Hank Jr.
Both Hal and Hank are nicknames for Henry, and Hank is one of the Germanic forms of the name.
Hank Armstrong's birth name is Henry Robert Piecura.
Hammerin' Hank :) His name is Henry Aaron but we all called him Hank.
Hank Majeski's birth name is Henry Majeski.
Hank Luisetti's birth name is Angelo Luisetti.
Hank Salas's birth name is Enrique Salas.
Hank Rolike's birth name is Henry Rolike.
Hank Werba's birth name is Herman Werblowski.
Hank Potts's birth name is Frank Potts.