Actually it's a little bit more complicated: the appliances are made by a company called BSH (https://en.wikipedia.org/wiki/BSH_Hausger%C3%A4te) which was originally (since 1967!) a joint venture between Siemens and Bosch, but Siemens withdrew from it in 2014, and since then it's a fully owned subsidiary of Bosch (but still uses the Siemens brand as well as some other brands such as Gaggenau, Neff, Thermador etc.).

Bosch owned Junkers since before WW2, at least heating appliances, I think airplanes where independent. They started rebranding Junkers to Bosch Thermotechnik ~20 years ago. I think they never sold heating appliances in UK under Junkers brand.

Someone in marketing must have put the kybosh (or maybe it's kybosch) on Junkers as a UK brand. For a couple of reasons, really.

Yeah, "Our Ju-88 will heat your home up real quick!" isn't really the optimal marketing slogan.

Good idea since depending how you pronounce junkers in English it could sound like an undependable appliance.

Another big reason is probably the infamous Junkers Ju 87 dive bomber which also saw use during the Battle of Britain (https://en.wikipedia.org/wiki/Junkers_Ju_87). Or any of the other military Junkers aircraft built during WW2, of course: https://en.wikipedia.org/wiki/Junkers#Aircraft

Maybe… but less likely since few people remember plus we don’t have an issue with Mitsubishi and they built planes that gave us pain as well. What I’m saying is if Mitsubishi had been Mitshit instead they’d likely also feel pressure to change their name due to its sound rather than WWII infamy.

Approximately no one on the US home front had to fear harm coming to them from a Mitsubishi product. This stands in rather stark contrast to the experience on the British home front:

https://www.iwm.org.uk/history/second-world-war/blitz/blitz-...

That has become common now in all industry - for example, in India, Bosch refrigerators uses compressors manufactured by Godrej (an indian company). So their indian fridges aren't exactly "German engineering", unlike their washing machine and dishwashers that are made in-house. LieBherr, another famous Swiss German brand, on the other hand has their own factory to make the refrigerators in-house in India, but their service in many cities is outsourced to one run by Bosch + Siemens (plus one more group I can't remember).