Originally Posted by Farnboro John
As they are traditionally named in English anyway.....
I've never called them anything else and I don't know anyone who has
Then I imagine you don't know any Australian or US birders? (Jaeger is used in both countries, per their official checklists.)
(Edit: also the official South African checklist, though I've no idea what common parlance is, and the old Roberts checklist used Skua across the board.)