Nathan Lewis is the name of:

• Nathan Lewis (chemist), American chemist
• Nathan Lewis (footballer), Trinidadian footballer
• Nathan Lewis (wide receiver), American football player for the Chicago Bears

• Potamonautes montivagus
• Potamonautes mutandensis
• Potamonautes neumanni
• Potamonautes niloticus
• Potamonautes obesus
• Potamonautes pilosus
• Potamonautes platycentron
• Potamonautes platynotus
• Potamonautes raybouldi
• Potamonautes rukwanzi
• Potamonautes suprasulcatus
• Potamonautes unisulcatus
• Potamonautidae
• Potamon (mythology)
• Potamon Potamios
• Potamon potamios
• Potamopyrgus
• Potamopyrgus antipodarum
• Potamopyrgus jenkinsi
• Potamopyrgus oscitans
• Potamornis
• Potamotherium
• Potamotrygon
• Potamotrygon henlei
• Potamotrygonid