The placenames, both English and Welsh placenames, mean "Amlot's farm", Amlot being a Norman-French name. The northern border of the parish is an ancient trackway leading towards St David's, with a Roman fortlet called "Castell Fflemish". This line is also the northern boundary of the cantref of Daugleddau, and was described by George Owen in 1602 as the language frontier, placing Ambleston in Little England beyond Wales. Ambleston was one of the parishes Owen described as bilingual, and in modern times it was predominantly Welsh-speaking.