I suspect rather that the reversed N is a take on the letter ŋ (https://en.wikipedia.org/wiki/Eng_%28letter%29 https://en.wikipedia.org/wiki/Eng_%28letter%29),

I suspect rather that the reversed N is a take on the letter ŋ (https://en.wikipedia.org/wiki/Eng_%28letter%29 https://en.wikipedia.org/wiki/Eng_%28letter%29), or "eng", since that's the sound that the 'n' in 'Anglo' makes anyway (when followed by a 'g').