Sanyo exists outside the keiretsu system, but is big enough and diverse enough (from the consumer electronics to home appliances to cell batteries to semiconductor fab) to be considered a Sumitomo keiretsu (also known as the group of companies) of its own.
Electrolux is more like a brand label of the company who makes home appliances. Electrolux, like Sanyo, exists outside the world's largest shareholder of its major appliance business.
