In Vol 9 of Miller's Photographic History of the Civil War .p.64 & .p.66 story of Little Giffin of Tenn.

Years ago I found a 1850 Census record that dhows he was from {east} Tenn

Find A Grave has a Isaac N Giffen of Co K 85th Regt in Missouri
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=Giffen&GSiman=1&GScid=1991176&GRid=43337193&