You've gone in precisely the right direction, Jhieminga! I've seen it described to as the Trébucien Sport and the Trébucien XI - but if the latter is correct, I don't know what happened to the other ten as this is the only aircraft designed by Sgt. Jean Jacques Henri Trébucien (it was constructed by SFCA) of which I'm aware. Trébucien was killed at Villacoublay on 4 December 1939 when a badly stowed observer's parachute caught in the slipstream of his Potez 25, causing it to dive in and crash through the roof of a nearby house. Looking at the design of the Sport, had he survived the war I could see him having gone down a road similar to that of Roger Druine and Jean Delmontez. His widow married Max Holste.
We wait the next enigma from you, Jhieminga (oops, sorry, I've just noticed that you've declared open house)!