Apalachee River Barrow/Gwinnett counties. Apalachee may be from Choctaw and means helper or ally. From Wikipedia, "The Apalachee River is a 74-mile-long (119 km)[1] (https://en.m.wikipedia.org/wiki/Apalachee_River_(Georgia)#cite_note-NHD-1)tributary of the Oconee River (https://en.m.wikipedia.org/wiki/Oconee_River)in the U.S. state (https://en.m.wikipedia.org/wiki/U.S._state)of Georgia.(https://en.m.wikipedia.org/wiki/Georgia_(U.S._state)) It rises north of Lawrenceville (https://en.m.wikipedia.org/wiki/Lawrenceville,_Georgia)in eastern Gwinnett County (https://en.m.wikipedia.org/wiki/Gwinnett_County,_Georgia)and flows southeast to join the Oconee River in Lake Oconee (https://en.m.wikipedia.org/wiki/Lake_Oconee)west of Greensboro.(https://en.m.wikipedia.org/wiki/Greensboro,_Georgia)"