Gender: Feminine
Origin: Basque
Meaning: “sea/ocean.”

Itsaso comes directly from the Basque word for ocean or sea.

In Basque mythology, this was the name of an evil sea spirit or a type of Siren. The itsaso would attract people to the sea so that they would drown.

It is also the name of a town in the Basque country of Spain where there is a shrine to the Virgin Mary, possibly a reason why the name was deemed usable among the Catholic Basque.