The Three Brothers is a rock formation, in Yosemite Valley, California. It is located just east of El Capitan and consists of Eagle Peak (the uppermost "brother"), and Middle and Lower Brothers.
Their original name
Members of the Mariposa Battalion named the Three Brothers after the capture of the three sons of Chief Tenaya near the base of the Three Brothers.
The name Three Brother
The Ahwahnechee name was “Kom-po-pai-zes”, or sometimes “Pompomposus”, is translated as “mountains with heads like frogs when ready to leap”. 
John Muir considered the view from Eagle Peak to be the most beautiful view of Yosemite Valley available.