Dr. Wonsam S. Hahn, 80, of Northbrook, formerly of Skokie, beloved husband of Myungja Regina; loving father of Roger (Autumn) and Christopher (Natjira); dear grandfather of Ivy and Ellie; fond brother of Won Bong, Wonja, and the late Won Kang. Visitation at Simkins Funeral Home 6251 Dempster St. Morton Grove, IL 60053 Saturday, June 25th from 10:00 a.m. until time of funeral service at 3:00 p.m. Cremation private. (847) 965-2500