The United States Secret Service uses code names to refer to the President of the United States, his family, other officials, and places. Originally, these code names were designed to protect sensitive communications, back in the day before restricted communications were routinely encrypted. Nowadays, there is no need to keep these names secret. Nevertheless, The Secret Service who guards the First Family and other U.S. officials continues to use the code names for clarity, brevity, and tradition. (1)
General Code Names
President of the United States: POTUS
First Lady of the United States: FLOTUS
Vice President of the United States: VPOTUS
The Obamas
Barack: Renegade
Michelle: Renaissance
Malia: Radiance
Sasha: Rosebud
The Bushes
George W.: Tumbler
Laura: Tempo
Barbara: Turquoise
Jenna: Twinkle
The Clintons
Bill: Eagle
Hillary: Evergreen
Chelsea: Energy
The Bushes
George H.: Timberwolf
Barbara: Tranquility
The Carters
Jimmy: Deacon
Rosalynn: Dancer
Amy: Dynamo
The Reagans
Ronald: Rawhide
Nancy: Rainbow
The Fords
Gerald: Passkey
Betty: Pinafore
The Nixons
Richard: Searchlight
Pat: Starlight
The Johnsons
Lyndon: Volunteer
Lady Bird: Victoria
Lynda Bird: Velvet
Luci Baines: Venus
The Kennedys
John F.: Lancer
Jackie: Lace
Caroline: Lyric
John Jr.: Lark
Other Individuals
Queen Elizabeth II: Kittyhawk, Redfern
Prince Charles: Unicorn
Frank Sinatra: Napoleon
Pope John Paul II: Halo
Sarah Palin: Denali
John McCain: Phoenix
Places
The White House: Castle
The Capitol: Punchbowl
(1) Source: Wiki “Secret Service Codename”