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Dollar Surname Origin
(Origin Celtic) Belonging to Dollar (Scotland)
[the first element is the Cymric dol = Old Gaelic dal, a dale, field: the second
is perhaps the Cymric ar, ploughed land].
Source: Surnames of the United Kingdom, A Concise Etymological
Dictionary; Henry Harrison; Vol.1 & 2.; The Eaton Press, 190 Ebury
Street, London, S.W; 1912.