Where does “Atlacomulco” come from?

Atlacomulco (Spanish) comes from Classical Nahuatl ātlacomōlli, from Classical Nahuatl ātl, from Proto-Nahuan *aa-, from Proto-Uto-Aztecan pa — water.

Ancestry of “Atlacomulco”, step by step

StepLanguageWordMeaning
1Classical Nahuatlātlacomōllia well
2Classical NahuatlātlAlternative spelling of atl; water
3Proto-Nahuan*aa-water
4Proto-Uto-Aztecanpawater
Every word from Proto-Uto-Aztecan paEvery word from Proto-Nahuan *aa-Every word from Classical Nahuatl ātl