Harmonica's brother was in Frank's gang
- Frank seems to go out of his way with a theatrical lynching, instead of say, putting a quick bullet to the man's brain. So for Frank, It's Personal and treachery was probably involved.
- Some of the names that Harmonica gives to Frank were other deceased members of the gang who outlived their usefulness, as upon hearing them, Frank reacts with a surprised familiarity reserved to former comrades, not to regular or random foes. One of the names was actually the real name of Harmonica's brother.
Dave Jenkins, Calder Benson [...] Jim Cooper, Chuck Youngblood.