Cheops has four smaller satellite pyramids to the east side.
This one is the Pyramid of Queen Meritetis, the wife of Cheops and daughter of Sneferu. It appears to have been a step Pyramid, like Djoser's Pyramid in Saqqarah.
The other pyramids are the ones of Queen Hetepheres, Khufu's Mother, and the Pyramid of Ka. This one was only oncovered in 1994 and it's almost completely destroyed by erosion and time.
The one on this picture is Queen Henutsen Pyramid, daughter of Senefrou and Cheop's half sister.