Save Type Settlement Usage Irish Pronounced Pron. MUL-in-GAR, MUL-ing-GAR [key] Meaning & History From Irish An Muileann gCearr, meaning "the left-hand mill", describing a mill noted in the legend of St. Colmán mac Luacháin, the patron saint of Lynn, Westmeath.Mullingar is the county town of Westmeath, Ireland.