GWs are a very British thing, so the nursery name in a country that doesn't have these dolls and where pollywog is a common word would be OK. But the Brirish context makes it highly questionable, especially as pollywog is 100% not a common word here.
OP is not saying 'it is de facto racist and must be banned.' She's discussing why she feels uncomfortable with it, and her reasons are entirely justified.
Similarly the tigger conversation which I really didn't want to fuel but its taken me back to my childhood. My mother used 'baby' in the rhyme but when I got to school I heard both n and tigger used. It's obvious why one eventually replaced the other, but MumWifeOther said that she feels uncomfortable with the word for its association in the context of the rhyme. That's not the same as saying the word is de facto racist and mustn't be used by anybody.
I still have WTP books on my shelf and I wouldn't stop my children reading them because the context for them is different and they wouldn't make that association.
I dont have a problem with baa baa black sheep, but I can see how some might depending on their cultural context. Again, no one is calling for it to be banned or saying that it is objectively racist.
The people getting mad on this thread aren't the black people, as usual it's the stubbornly blind, racist apologists getting their knickers in a twist.