Ioannakis, in the works of Harry Turtledove, may refer to:
Monarchs in the Videssos Series:
- Ioannakis II, ruled Empire of Videssos approximately 900 years after founding.
- Ioannakis III, ruled Empire of Videssos approximately 1200 years after founding.
Other:
- Papa Ioannakis (Lokrian), a priest and minor character in Every Inch a King.