Marinus I was probably a Hypatus of Gaeta in association with his father from 839

839

Year 839 was a common year starting on Wednesday of the Julian calendar.- Europe :* Louis the Pious attempts to divide his empire among his sons.* Ethelwulf succeeds Egbert as king of Wessex....

 or thereabouts until he disappears from records abruptly in 866

866

Year 866 was a common year starting on Tuesday of the Julian calendar.- Asia :* Fujiwara no Yoshifusa becomes regent of Japan, starting the Fujiwara regentship.- Europe :...

. From the abruptness of his disappearance, he and his father are often supposed to have been disposed violently by their successor Docibilis I

Docibilis I of Gaeta

Docibilis I was the Hypatus of Gaeta from 867 until his death.The sudden disappearance of the co-hypati Constantine and Marinus I after 866 strongly suggests that perhaps Docibilis' assumption of power had been violent...

. Marinus witnessed his father's land grants in 839 and later records give him the title comes

Comes

Comes , plural comites , is the Latin word for companion, either individually or as a member of a collective known as comitatus, especially the suite of a magnate, in some cases large and/or formal enough to have a specific name, such as a cohors amicorum. The word comes derives from com- "with" +...

. It has been suggested that a prefect

Prefect

Prefect is a magisterial title of varying definition....

of the name Kampulus was his son (Skinner, 35).

Sources

• Skinner, Patricia. Family Power in Southern Italy: The Duchy of Gaeta and its Neighbours, 850-1139. Cambridge University Press: 1995.
• Caravale, Mario (ed). Dizionario Biografico degli Italiani XL Di Fausto – Donadoni. Rome, 1991.
• Foundation for Medieval Genealogy: Southern Italy.