Cancer is a Cardinal water sign, ruled by the moon. As the fourth sign of the zodiac, the Cancer individual is a deeply emotional person inside, but is smooth and confident on the outside. Their first love is of home and family and they are nurturing and caring in the family setting, creating a cozy, comfortable, safe existence behind the doors of their own home. Famous and historical characters sharing this sign include Princess Diana (July 1), Nelson Mandela (July 18), and O.J. Simpson (July 9).