Well. If you squint a little, Sud Aviation and BAC + others became Airbus. Airbus was first a consortium and then a proper successor (through a merger) to several European aircraft manufacturers. Sud Aviation's acquirer Aérospatiale was an initial member of the Airbus consortium and BAC's acquirer British Aerospace joined slightly later in 1979.

https://en.wikipedia.org/wiki/Airbus#History has a diagram of all the predecessor companies.