Askham, in the Bassetlaw Wapentake of Nottinghamshire, probably goes back to an original Old English æschām ‘ash tree farm,’ but the Old Norse cognate askr was substituted at an early date.
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Image © Milestone Society, via Geograph, CC BY-SA 2.0
J.E.B. Gover, Allen Mawer and F.M. Stenton, The Place-Names of Nottinghamshire. English Place-Name Society Volume XVII (1940), p. 44.