PARIS — France’s far-right leader Marine Le Pen put forward a new name for her National Front party on Sunday, hoping to reinvigorate the party and bolster its electoral chances following its setbacks in last year’s presidential and legislative races.

Ms. Le Pen said party officials had agreed on Rassemblement National, which can be translated as National Rally or National Gathering, as the new name. It must still be approved by a mail vote of all party members in the coming weeks.

“The name National Front bears an epic and glorious history that no one must deny,” Ms. Le Pen told a cheering crowd at the end of the party’s annual congress in Lille. But she also said that for many in France the name was “a psychological brake” that kept them from joining the party or voting for its candidates.

Ms. Le Pen spoke a day after the surprise appearance of Stephen K. Bannon, the former chief strategist for President Trump, at a party congress. In a fiery speech on Saturday, Mr. Bannon told party members to “let them call you racists” and praised the National Front for standing up to France’s political and economic establishment.