Celer (builder), foreman appointed by Romulus to oversee the building of Rome's first walls.Quintus Caecilius Metellus Celer, consul of the Roman Republic, 60BCPublius Egnatius Celer, first century Stoic philosopherCeler (consul), 6th-century Byzantine ministerSaint Gelert, 7th century Welsh saint
Biology
Misumenops celer, the Celer Crab SpiderThermococcus celer, a species of extremely thermophilic ArchaeaLaosaurus (Laosaurus celer), a genus of hypsilophodont dinosaurMicrovenator (Microvenator celer), a genus of dinosaur from the Early Cretaceous Cloverly FormationTrichoniscus pusillus (Philougria celer), one of the five most common species of woodlice in the British Isles
Other
Celer (group), the husband and wife duo of Will Long and Danielle Baquet-Long
