The Fonda Fam

Friday's Trivia Question: Each of the three related people in this photograph are famous in their own right, and to varying degrees of fame. I'll give you a hint as to their better-known onscreen aliases: from left to right, think passenger, migrant worker, and gunslinger.
Who are they?

Update: You're looking at:

Henry Fonda, known for his role as migrant farmer Tom Joad in The Grapes of Wrath, with kids Peter Fonda (of Easy Rider fame) and Jane Fonda (who becomes a sharpshooter in 1965's Cat Ballou).
source: The Screen Legend Henry Fonda Site

Congratulations to Joan for being the first to post the correct answer!