sentences:  Beginning in the third century AD, the area was colonized by the Alemanni.Evidence of this colonization was discovered in 1878 during the construction of the Gäu Railway between Stuttgart and Freudenstadt, when several Alemannic graves were found.The suffix -"ingen" means that Ehningen can be classified as one of the original Swabian villages; the original name "Ondgingin" or -"onding" indicates the town may be named for an Alemannic tribe leader named "Ondo".