Some surprises in here https://www.popularmechanics.com/technology/gear/a28359/megabrands-tools-graphic/
Didn't know Dremmel & Freud were Bosch One piece of nostalgia that I couldn't find was the old Wolf brand allegedly snapped up by Kango and now disappared - Wolf Gartten is a separate company
Surprised you didn't know that. Here is another intresting link: https://toolguyd.com/tool-brands-corporate-affiliations/
That covers the US brands - there must be a chart of UK/Europe too. Especially with all the Kingisher owned brands, then companies like Trend.