Related Clues:

• Donny and Marie, e.g.
• Twins, for example
• They're often rivals
• Young rivals, often
• Dolls' partners
• '___ and Dolls'
• Brothers and sisters, for short
• The Baldwins, e.g.
• Close relatives
• Half a 1950 musical
• Sisters, e.g.
• What an only child lacks
• A boy and his sis
• Pair in bunk beds, perhaps
• Ones sharing a branch of a tree