Mainly U.S.: transferred use of the surname, adopted in honour of George Mifflin Dallas, Vice-President 1845–49, after whom the city in Texas is named. The surname is of Scottish origin, derived from the village of Dallas in Morayshire, named in Gaelic as Dalfhas ‘meadow stance’, i.e. a meadow traditionally used as a night's resting place by cattle drovers.
English: habitational name for someone from either of two places called Mildenhall, in Suffolk and Wiltshire. The place in Suffolk may have been named in Old English as ‘middle nook of land’, from middel + halh, or it may be of the same origin as the Wiltshire place name, ‘Milda's nook of land’, from an unattested Old English personal name + halh. The spelling Mendenhall does not appear in English sources, and this may be a U.S. variant.