Why? What is a C Series anyway, there was no A or B series. 100 for 100 seats and 300 for..?
I could have accepted CSJ as a successor to CRJ perhaps, but C Series is a meaningless marketing name that doesn't translate directly to Canadian-French; Série C pour les francophones.
As I understand it from the following quote in the article referenced per OP:
The C Series branding was revealed at the Farnborough expo in 2004, where Bombardier said that it stood for “competitive, continental, connector.” The name also harked back to planemaker Canadair, which formed the core of Bombardier Aerospace following its acquisition in 1986, and hinted at the model’s aim of breaking the existing single-aisle duopoly, with “A” representing Airbus and “B” Boeing Co.
the C Series reflects acronym from the series of three words: Competitive, continental, connector followed by the C in Canadair (as opposed to A for Airbus & B for Boeing) then you have the numerical designator x00; so it ends up showing C Series C100/300
, it is like they are trying to address their business case with such a name.
If you ask me, Airbus A200 series could be appropriate as opposed to A320 series. Then you will have Airbus A201 (for C100) and Airbus A203 (for C300)