Hi Bill
A number of the OPRs have, as I'm sure you've found, only the father showing on the birth entry.
You have the marriage of John Shand and Jean Massie on 20 OCT 1745 Methlick, Aberdeen, Scotland. You then have a number of births showing with only John Shand given as father:
1. JEAN SHAND Christening: 12 MAR 1752 Methlick, Aberdeen, Scotland
2. JOHN SHAND Christening: 02 JUL 1748 Methlick, Aberdeen, Scotland
3. GEORGE SHAND Christening: 06 OCT 1761 Methlick, Aberdeen, Scotland
4. MARY SHAND Christening: 17 FEB 1759 Methlick, Aberdeen, Scotland
5. ALEXANDER SHAND Christening: 21 SEP 1746 Methlick, Aberdeen, Scotland
6. WILLIAM SHAND Christening: 01 MAY 1750 Methlick, Aberdeen, Scotland
7. JAMES SHAND Christening: 12 OCT 1754 Methlick, Aberdeen, Scotland
8. JOSEPH SHAND Christening: 25 MAY 1764 Methlick, Aberdeen, Scotland
The last entry for Joseph would fit the age of Joseph (78) in the 1841 Census in New Deer.
With Joseph's death pre-1855 (I can't see any death entries on SP for him), it's hard to prove conclusively. There doesn't seem to be the use of mother's surname either for the John/Jean and Joseph/Barbara's children that I can see.
Have you tried looking for any death details for him and perhaps a monumental incription?
Regards.
Monica