Alex
Sorry do not know if he was a Frenchman, though I suspect he was as it is a French Name.
http://translate.google.com/translat...:en%26pwst%3D1
Prehaps you should consider contacting the admistrator of that site..
BTW there was another
KOECHLIN serving with 328 Sqn: but he was LV (Naval Rank detached from AdA) Henri SALOMON-KOECHLIN who was killed 15/09/1947
Paul