Possible Clues:

• Betsy and Diana, for two
• Characters in 'Macbeth' and 'Richard II'
• Susan's family on 'Seinfeld'
• Betsy and Diana
• Family of George's fiancée on 'Seinfeld'
• Family in Upton Sinclair's 'Oil!'
• Perot et al.
• Betsy, Diana and others
• Media executive Steven and others
• Actress Katharine et al.