Greg/Gregor/Gregory/Gregori can refer to:
- Greg, the Alpha
- Greg Beckitt, the husband of Helen Beckitt, and father of Amanda Beckitt
- Greg Bardalacki, the male sibling of the couple
- Gregor, the practitioner Charity Carpenter fell for
- Gregori Cristos, the Senior Council member
- Gregory Taggart, Karrin Murphy's first husband