Definition of "Aomen"

Yet try using Peking or Canton today and there will be howls of protest, though these are legitimate anglicisations based on usage derived from the role of Canton in China’s trade history. There is no reason why English speakers should follow China’s official romanisations any more than do the French, who still use Pekin for Beijing. It also raises the question of whether Hong Kong and Macau are soon to be replaced in English by Xianggang and Aomen.

2019 February 17, Philip Bowring, “Duterte’s proposal to change the Philippines’ name highlights the vexed history of place nomenclature”, in South China Morning Post‎, archived from the original on 17 February 2019, Opinion‎