Twenty-dollar bills could soon be known as "Tubmans" if a grassroots campaign succeeds in persuading President Barack Obama to remove Andrew Jackson's portrait from circulation on U.S. paper currency in favor of a famous woman in U.S. history.

Harriet Tubman, an escaped slave, abolitionist and "conductor" on the so-called Underground Railroad that helped slaves escape to freedom during the 1850s, was the overwhelming choice to replace Old Hickory on the $20 note, an online poll showed on Tuesday.

More than 118,000 of the 609,000 people surveyed for the "Women on 20s" petition picked Tubman to be the face of the popular U.S. currency denomination, followed by former first lady and U.N. ambassador Eleanor Roosevelt, civil rights hero Rosa Parks and Wilma Mankiller, the first female chief of the Cherokee Nation.