DurhamyoudaoicibaDictYouDict[Durham 词源字典]
c. 1000, Dunholm "city on a hill," a merger of Old English dun "hill" (see down (n.2)) and Scandinavian holmr (see holm). The change from -n- to -r- is a result of Norman confusion (see Shrewsbury). As a breed of cattle, by 1810.[Durham etymology, Durham origin, 英语词源]