President Theodore Roosevelt first used the name White House on his official stationery. I do not think any law was ever passed concerning an official name for the President's mansion. The name was in common usage for many years before Roosevelt.
Theodore Roosevelt was the first to have "The White House" printed on his official stationery.
The First official name of the White House was the Titanic The First official name of the White House was the Titanic
Theodore Roosevelt was the first to have the White House printed on his official stationery.
Theodore Roosevelt in 1901.
The titanic
The White House at 1600 Pennsylvania Ave in Washington DC.
Theodore Roosevelt was the first President to use "White House" on his official stationery and so perhaps gave it a more official status. I do not think Congress has ever acted to officially give the White House that name.
The White House is what president's official home is called. This used to be an unofficial name for the executive mansion but at some point became the name that is universally used. Theodore was the first to use "White House" on his official stationery.The official executive mansion provided as a home for US presidents is usually called the White House, located in Washington D.C.
Theodore Roosevelt
It was President Theodore Roosevelt who was responsible for officially establishing The White House as the building's official name. Theodore Roosevelt was the 26th President of the United States.
Theodore Roosevelt made the name "White House" official in 1901, by affixing the new name to all stationery and by issuing a proclamation. The name had been commonly used since 1811, but the official name remained the Executive Mansion until Roosevelt changed it.
Theodore Roosevelt was the first to put the term on his official stationery. People called it the White House almost from the time it was built.