The basic design follows that of the BAC 1-11, which pre-dated the DC-9 by a couple of years. So it is pretty much a basic early 1960s British design that's been followed by the Americans (DC-9, MD-80, 717) , Russians (TU-134, RRJ), Brazilians, and Canadians (CRJ). The Dutch also used a similar layout, the French Caravelle has a noticeably different tail.
Of course, the larger and earlier VC-10 has a similar layout, but with 4 engines. (See also the similar Russian IL-52 and the much smaller Lockheed Jetstar for similar 4 engine designs.)
Since it predates the BAC, I guess the answer to your question is "Vickers".
Typo on the Russian plane - make that IL-62.