Captain Marcus Flavius Geminus is Flavia Gemina's father.
Marcus is often away, as he goes on many voyages.
He is absent-minded and generally easy-going.
Marcus is very tanned from being at sea.
- The Thieves of Ostia
- The Dolphins of Laurentum
- The Twelve Tasks of Flavia Gemina
- The Enemies of Jupiter
- The Gladiators from Capua
- The Colossus of Rhodes
- The Fugitive from Corinth
- The Sirens of Surrentum
- The Charioteer of Delphi
- The Slave-girl from Jerusalem
- The Beggar of Volubilis
- The Prophet from Ephesus
- The Man from Pomegranate Street