Traian or Trajan can refer to:

• Traianus, or Trajan, the 13th Roman emperor.
  • Marcus Ulpius Traianus, a senator and father to Emperor Trajan
  • Traianus Hadrianus, or Hadrian, the 14th Roman emperor and successor to Trajan
  • Trajan's Column, a monument raised in his honor.
    • Trajan (typeface), a font made by Carol Twombly based on the inscriptions on the column.
• Trajan Decius, the 34th Roman emperor
• Traianus (magister peditum), Roman general in the Gothic War (376–382)
• Trajan the Patrician, Byzantine historian
• Traian Băsescu, President of Romania from 2004 to 2014
• Traian Bratu, Romanian Germanist
• Traian Brăileanu, Romanian sociologist and politician
• Traian Cihărean, Romanian weightlifter
• Traian Cocorăscu, Romanian general
• Traian T. Coșovei, Romanian poet
• Traian Crișan, Romanian Greek-Catholic bishop
• Traian Demetrescu, Romanian poet
• Traian Herseni, Romanian social scientist
• Traian Ichim, Romanian chess player
• Traian Ionescu, Romanian footballer
• Traian Iordache, Romanian footballer
• Traian Ivănescu, Romanian footballer
• Trajan Jeffcoat (born 1999), American football player
• Traian Lalescu, Romanian mathematician
• Trajan Langdon, American professional basketball player
• Traian Moșoiu, Romanian general
• Traian Neagu, Romanian canoeist
• Traian Nițescu, Romanian engineer and bobsledder
• Traian Popovici, Romanian lawyer
• Traian Stoianovich, Serbian-Canadian historian
• Traian Săvulescu, Romanian biologist
• Traian Trestioreanu, Romanian painter
• Traian Vuia, Romanian aviator

• Traian, Bacău, a commune in Bacău County
• Traian, Brăila, a commune in Brăila County
• Traian, Ialomița, a commune in Ialomiţa County
• Traian, Olt, a commune in Olt County
• Traian, Teleorman, a commune in Teleorman County
• Traian, a village in Săcele Commune, Constanţa County
• Traian, a village in Braniştea Commune, Galaţi County
• Traian, a village in Bivolari Commune, Iaşi County
• Traian, a village in Săbăoani Commune, Neamţ County
• Traian, a village in Zănești Commune, Neamţ County
• Traian, a village in Doba Commune, Satu Mare County
• Traian, a village in Cerna Commune, Tulcea County
• Traian, a district in the town of Vânju Mare, Mehedinţi County

• Trajan (typeface), a typeface emulating Roman square capitals
• Trajan (board game)

This disambiguation page lists articles associated with the title Traian.
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