Johnny My Man (aka Farewell to Whiskey)
I'm a Poor Bonnie Lassie
Johnny, Lovely Johnny
Loving Hannah
The Highland Widow's Lament
The Bonnie Banks of Fordie (aka Babylon)
Barbara Allen

And, while we're on pedantry, the words to "She Moved Through the Fair" were written by an Irish poet, one of the Padraics (Padraic Colum?) and so are not strictly traditional.

Thread creep: who wrote "The Lakes of Ponchartrain?" I thought it was found in traditional repertories, including some New York singer Ellen Stekert recorded ages ago. (And, yes, I'll look this up in the Forum)