A press release from the National Oceanic and Atmospheric Administration says the names Matthew and Otto "ravaged the Caribbean so much previous year their names have been retired".
The names Matthew and Otto have been retired for Atlantic tropical storms and hurricanes following the deadly 2016 season.
Before Matthew and Otto the last names retired were Erika and Joaquin in 2015.
Matthew became a Category 5 hurricane on the night of September 30, making it the first Category 5 hurricane in the basin since Hurricane Felix in 2007. Officials say Matthew was responsible for 585 deaths, with over 500 of those occurring in Haiti, making Matthew the deadliest Atlantic Hurricane since Hurricane Stan in 2005.
It's estimated that Hurricane Matthew damaged 100,000 homes and businesses in the state, causing between $1.5 to $2 billion in losses.
The WMO maintains six lists of names that are used for tropical storms and hurricanes in the Atlantic and Gulf of Mexico.
Otto, meanwhile, swelled into a Category 3 storm on November 22 as it made landfall in Nicaragua and crossed Central America to reach the Pacific Ocean.
"These two storms ravaged the Caribbean so much previous year their names have been retired by the World Meteorological Organization's Region IV Hurricane Committee", NOAA added.
Both Matthew and Otto developed into powerful late-season hurricanes in the Caribbean, leaving behind significant damage which impacted millions.
There are separate lists for hurricanes in the Atlantic and the Pacific, as well as for typhoons in the western Pacific and cyclones in the Indian Ocean.
View the full list of retired names. It was also the fourth major hurricane of the 2016 season.