Pet form of any of the given names beginning with the letter D- (compare Jay and Kay), in particular Dorothy. It is also used as an independent name, and may in some cases be associated with the River Dee (compare Clyde).
English: nickname for a newcomer to a place, from Middle English newe ‘new’ + man ‘man’. This form has also absorbed several European cognates with the same meaning, for example Neumann. (For other forms, see Hanks and Hodges 1988.)