Definition of "Justin"

What is there, I wonder, about the name Justin that gives its bearer the quality of leadership? Justin Morrill was a leader of men. Justin Morgan was a leader of horses.

1892, Alfred Emanuel Smith, New Outlook, Outlook Publishing Co., published 1925, page 43

'It says here his name was Justin Summers. Now, if that ain't the whitest white-guy name of all time, then I don't know what. It's just a damn shame.'

1996, Sherman Alexie, Indian Killer, page 102