D'ridthau
- Full name: D'ridthau
- Species: Romulan
- Gender: Male
- By March 2156: Subcommander, executive officer, First Legion, Romulan Guard; IRW Terrh'Dhael (ENT Novel: Beneath the Raptor's Wing)
- Death: March 12, 2156; KIA (ENT Novel: Beneath the Raptor's Wing)
- Died to injuries sustained in Haakonan attack the day prior (ENT Novel: Beneath the Raptor's Wing)