1. A very well-known public figure 
2. A brand name that is well known to the great majority of households

Derived forms: household names

• genus Rupicola
• genus Ruptiliocarpon
• genus Ruscus
• genus Russula
• genus Ruta
• genus Rutilus
• genus Rynchops
• genus Rypticus
• genus Sabal
• genus Sabbatia
• genus Sabinea
• genus Saccharomyces
• genus Saccharum
• genus Sadleria
• genus Sagina
• genus Sagitta
• genus Sagittaria
• genus Sagittarius
• genus Saiga
• genus Saimiri
• genus Saintpaulia
• genus Salamandra
• genus Salicornia
• genus Salix
• genus Salmo