What is "varro"

Varro is a cognomen used by ancient Roman men of the gens Terentia, including:

• Marcus Terentius Varro, sometimes known as Varro Reatinus, the scholar
• Publius Terentius Varro or Varro Atacinus, the poet
• Gaius Terentius Varro, the consul defeated at the battle of Cannae
• Marcus Terentius Varro Lucullus, brother of Lucullus, originally from gens Licinia