What was James Polk's mother's maiden name?

Sarah Childress Polk September 4, 1803 - August 14, 1891) was James Polk's wife. They were married on January 1, 1824, at the plantation home of the bride's parents near Murfreesboro, Tennessee.
Yes, he married Sarah Childress. Sarah and James married in 1824.

James being 28 Sarah being 20