Le Pen is assured of being re-elected party leader at the FN conference at the weekend in Lille as there is no competition.
Bannon was in France on Saturday, bringing his closed-borders, anti-trade, anti-foreigner message to members of the country's struggling far-right National Front party. A new leadership structure and new bylaws are also being unveiled at the two-day congress.
Le Pen's niece Marion recently drew scrutiny from conservative activists by her appearance at the Conservative Political Action Conference, an annual gathering of Republicans and conservatives near Washington.
Bannon told the National Front crowd that he had learned from traveling the world that "history is on our side" and that "the globalists have no answers to freedom".
This week Le Pen seemed heartened by the strong gains made by the allied anti-immigrant League party in Italy's general election, hailing it as a "new stage in the awakening of the people". "It went from a party of protest first in its youth, then from a party of opposition to a party of government", Le Pen said on French broadcaster France 2.
The party canvassed 51,000 members a year ago about the name change proposal and on Saturday it emerged just 52 per cent had voted in favour among the 30,000 who responded.
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The outcome of Italy's election last weekend has energized France's far right.
In France, some warned that Bannon's support could damage Le Pen's efforts to cleanse the National Front of the racist stigma that has long clung to the party's image. Jean-Marie Le Pen also is to be scratched from the party's books along with his title of honorary president-for-life.
An election next year for members of the European Union's lawmaking arm will be the National Front's first chance to test its rebranding strategy. The percentage of respondents who agreed she would make a good president fell to 16 percent, an eight-point drop from 2017. Her top lieutenant, Florian Philippot, who appealed to the euroskeptic contingent, departed to form his own party.
"Right or left doesn't mean anything and doesn't reflect the real division in France today which is between those who feel the nation is an obstacle and those who feel the nation is a jewel to be defended", she said. She bowed out of politics after her aunt's presidential defeat, but is expected to come back in a new role.
Bannon, a surprise speaker at the event, has been touring European cities to meet with right-wing party members.
The Front National (FN) have been out of the media limelight after their defeat to Emmanuel Macron in last May's presidential elections.