He's not sure which of the many names was her actual name, and repeats what she said under his breath in an attempt to sort it out. It doesn't help much with the name - he can ask his father about that later, or maybe someone will come over and adress her - but it alerts him to the 'from' in front of Lousiana. ...Wherever that is. It sounds English. Maybe a town in the area so she thinks that he might know it?

"Lousiana?" Then again, it could be butchered French. He's heard a bit of that on the way up. Or... Spanish? Things really are hard to recognize when they have a certain accent.