Since you have considerable data, you need to indicate where you have already looked. For example the following is from the LDS FamilySearch website. Do you have this?
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IGI Individual Record FamilySearch™ International Genealogical Index v5.0
ELSPET GEORGINA
FORBESBirth: 16 MAY 1839 Old Machar, Aberdeen,
Scotland Father: GEORGE
FORBESMother: ELSPET
MURRAY Extracted birth or christening record for the locality listed in the record.
Batch No.: C119068 1836 - 1855 0991249 Film 6901058 Film
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Note that these data are recorded in LDS microfilm 0991249 that can be rented at your local LDS Family History Center. Many times there are additional information in the actual record.
This record is also in that microfilm.
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IGI Individual Record FamilySearch™ International Genealogical Index v5.0
British
Isles GEORGE
FORBES Spouse: ELSPET
MURRAY Marriage: 01 MAR 1825 Old Machar, Aberdeen,
Scotland Extracted marriage record for locality listed in the record.
Batch No.: M119068 1820 - 1835 0991249 Film 6901059 Film
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The parents of George and Elspet and their birthplace may be in the actual record.
I would suggest that you also join the Aberdeenshire mail list. There are additional local (to Aberdeen) experts that frequent that list.
http://lists.rootsweb.ancestry.com/index/intl/SCT/ABERDEEN.h...In addition Aberdeen has an excellent Family History Society. They have additional resources.
http://www.anesfhs.org.uk/index.htm