Yes, the McDonnell Douglas project, taken by Boeing after the merger / absorbtion or whatever it is called, was going to be comercialized as M95. Yes, you're right. But I made reference to the DC9-10 because of the size. Later, even other versions of the same DC9 were longer (DC-9-20 & -30) and/or more powerful (-25 & -40, if I'm right) Actually, all the DC9s, all the M80s (80 aka "DC9 Super 80", 81, 82, 86, 87, 88) and the M90s, including the 95, later called 717, are all evolutions or adaptations of the same concept, with more efficient engines and wings, and newer avionics... but sharing fuselage sections
Someone else will be able to be more accurate than I can, tough.