Most people have a tendency to think that Classical music is mostly made by stuffy, rich people who hate the poor, but what a lot of people don't understand (and what I've been trying to show) is that many Classical composers where down to Earth people who had great love for their countries and would go around the countryside learning Folk music, so here is some of that Folk music made by Classical composers.
http://www.ranker.com/list/folk-songs-by-classical-composers/zachthemusicmage,
Mazurkas
Chopin
25 Norwegian Folk Songs and Dances
Grieg
Twelve Variations On Ah Vous Dirai-je, Maman
Mozart
Folk Songs
Luciano Berio
Twenty-Five Scottish Songs
Beethoven
25 Irish Songs
Beethoven
4 Songs On Serbian Folk Poems
Dvorak
Italian Song
Tchaikovsky
6 Finnish Folksongs
Jean Sibelius
Choral Folk Music
Gustav Holst and Ralph Vaughn Williams