Characters by Name: O
Olivaro
Début: The Broken Ear - page 30, frame 3 - General Olivaro is the liberator of San Theodoros, 1805 - 1899.
Also appears in: named in Tintin and the Picaros (page 23, frame 2).
Olsson, C
Début: The Red Sea Sharks - page 43, frame 14/C4 - [The name Olsson can be seen on the green trunk that dropped on Captain Haddock's foot.]
Onassis
Début: Flight 714 - name mentioned on page 8, frame 7 - Millionaire.
Oyle, Maurice
Début: Tintin in America - his first name appeared on page 54, frame 1; full name appeared on page 55, frame 4 - Villain. Manager of the Grynde Cannery who tried to kill Tintin.