The name Olaf has been used for five tropical cyclones in the Eastern Pacific.
The name is used on the modern six-year lists:
Hurricane Olaf (1985), never threatened land
Tropical Storm Olaf (1997), made landfall twice
Hurricane Olaf (2003), made landfall in Mexico as a tropical storm
Tropical Storm Olaf (2009), approached Baja California
Hurricane Olaf (2015), strong category 4 hurricane that became the first storm on record to cross into the Central Pacific and back into the Eastern Pacific while still tropical
It was also used for one tropical cyclone in the Southwest Pacific:
Cyclone Olaf, a 2005 Category 5 cyclone that affected Samoa