Hi Vic,
The Guiness Book of Air Warfare (1993) claimed that Lt. Frigyes Hefty of the 42.Fighter Squadron, Austro Hungarian Air Corps, was the first recorded instance. He jumped from his burning Albatros D.III after fight with Italian Hanriots over the river Piave on 22.August 1918.
But I think the first German pilots parachuted in 1917!
The Jasta Pilots reports a whole series of examples for parachute jumps but I did not find an example for 1917 during my limited time of search.