I take your point, and agree when it comes to Google
But here's rabbit hole for anyone interested. That brand name being synonymous with the product thing is actually fairly regional.
We just call them tissues here. I think you can get Kleenex brand here, but I don't think anybody cares about the brand of tissue. There's a particular kind that has some kind of aloe Vera extract which is all I'll use if I'm sick, but I don't even know what brand they are.
On the flip side, we call marker pens Biros, and where I grew up we called them Khokis