Corsair uses registrations for its fleet that usually have meanings.
For instance its B747-300's are registered F-G(SEA) / (SEX) / (SUN) in reference to atmosphere of destinations that Corsair can take you.
F-H(JAC) another B747-300 is registered in honor of Jacques Maillot the founder of Corsairs parent owner Nouvelle Frontiers, whom incidentaly also had a B747-200 F-GP(JM) named after him.
Its single B747SP is F-G(TOM) after the DOM-TOM French overseas departments.
Corsair next B747-300 will be registered F-G(SKY).
Not sure of the the reasons behind the A330 registrations, however having done work with Corsair, I am sure they have a meaning.
From the desert to the sea, to all of Southern California