LCPL William Harmon Koho was born May 14, 1947.  He died March 14, 1967 at the age of 19 in Thua Thien Provence.  He is remembered on panel 16E, line 79.  You can read remembrances of him at https://www.vvmf.org/Wall-of-Faces/28580/WILLIAM-H-KOHO/