Jeanie with the Light Brown Hair by Stephen C. Foster (1826-1864). PDF sheet music arranged for classical guitar. Comes with both a notation edition with left hand fingering and a separate tab edition. The level is easy-intermediate (Grade 3).
My PDF Sheet Music from Werner Guitar Editions
Stephen Collins Foster was an American composer known for his parlour and minstrel music during the 19th Century. He wrote more than 200 songs. Read more at his wiki article. Here is the YouTube link if you want to watch my performance there.