Google told me on my own + page several of the pseudonyms I've used across the web. Where exactly? I don't see anything like that on mine, and I'm curious whet

Google told me on my own + page several of the pseudonyms I've used across the web. Where exactly? I don't see anything like that on mine, and I'm curious whether Google knows who orangecat is. (Of course they may anyway even if they don't tell me).