Laelius is a name that can refer to:

People

• Gaius Laelius, a Roman statesman, who was consul in 190 BC and friend of Scipio Africanus
• Gaius Laelius Sapiens (consul of 140 BC), a Roman statesman, son of the above, who was consul in 140 BC, and was friend to Scipio's adoptive grandson Scipio Aemilianus
• Decimus Laelius (tribune of the plebs 54 BC), one of the prosecutors Cicero opposed in the defense speech Pro Flacco
• Laelius Socinus, a 16th-century humanist and reformer

Literature

• Laelius de Amicitia, a philosophical dialog by Cicero on friendship, which is based on the second Gaius Laelius and his relationships with various great men
• Sir Robert Pipon Marett, a Jersey poet who used the pen name Laelius

Biology

• Laelius (wasp), genus of wasp from the subfamily Epyrinae, family Bethylidae

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