You may have these hypotheses ....
Starting with: Robert Stevenson and Catherine Mackieson
with Son Robert 67 in 1851 Census
From OPRs .... [Not LDS entries]
ROBERT STEVENSON Christened 26 APR 1783 Saint Ninians
with parents ROBERT STEVENSON and KATHARINE MACKIESON
Children of Robert and Catherine/Katherine:
MARGARET STEVENSON Christened on 29 DEC 1776 Saint Ninians
JOHN STEVENSON Christened on 19 DEC 1778 Saint Ninians
CATHARINE STEVENSON Christening on 19 DEC 1780 Saint Ninians
ROBERT STEVENSON Christened on 26 APR 1783 Saint Ninians
FRANCIS STEVENSON Christened on 07 JUN 1788 Saint Ninians
JAMES STEVENSON Christened on 03 OCT 1790 Saint Ninians
WILLIAM STEVENSON Christened on 02 SEP 1795 Saint Ninians, Stirling, Scotland
From traditional Scottish naming patterns ....
Robert Snr's father may have been John
C/Katharine's father may have been John or Robert
C/Katharine's mother may have been Margaret
Robert Snr's mother may have been Margaret or Catharine
Also, there may have been a Francis, a James, a William as siblings of Robert Snr and/or C/Katharine
Mackieson = McKesson ?
OPRs ...
FRANCIS MCKESSON Christened on 19 JAN 1746 Lecropt, Perth, Scotland
Parents: ROBT. MCKESSON and MARGT. MILLER
LILIAS MCKESSON Christened 04 MAR 1749 Lecropt, Perth, Scotland
Parents: ROBT. MCKESSON and MARGT. MILLER
LDS entries
James McKesson Christened on 16 MAY 1736 Lecropt, Perth, Scotland
Katharine McKesson Christened on 20 JUL 1752 Lecropt, Perth, Scotland *****
Parents: ROBT. MCKESSON and MARGT. MILLER
Possibilities:
OPRs
ROBERT STEVENSON Christened on 12 OCT 1755 Saint Ninians, Stirling, Scotland
Parents JOHN STEVENSON and MARGARET WALKER
All listed children .....
JAMES STEVENSON Christening: 13 JUN 1748 Saint Ninians, Stirling, Scotland
JOHN STEVENSON Christening: 28 DEC 1749 Saint Ninians, Stirling, Scotland
MARGARET STEVENSON Christening: 23 SEP 1751 Saint Ninians, Stirling, Scotland
ROBERT STEVENSON Christening: 12 OCT 1755 Saint Ninians, Stirling, Scotland
JEAN STEVENSON Christening: 31 JUL 1757 Saint Ninians, Stirling, Scotland
ABRAHAM STEVENSON Christening: 14 JUL 1759 Saint Ninians, Stirling, Scotland
JOHN STEVENSON Christening: 24 FEB 1761 Saint Ninians, Stirling, Scotland
ALEXANDER STEVENSON Christening: 19 JUN 1763 Saint Ninians, Stirling, Scotland
JEAN STEVENSON Christening: 19 JUL 1765 Saint Ninians, Stirling, Scotland
WILLIAM STEVENSON Christening: 17 APR 1768 Saint Ninians, Stirling, Scotland
OR ...
OPRs
ROBERT STIVENSON Christened on 05 MAY 1752 Saint Ninians, Stirling, Scotland ***********
Parents JOHN STIVENSON and MARGARET GLEN
All listed children .....
JENNET STEVENSON Christened on 07 AUG 1745 Saint Ninians, Stirling, Scotland
WILLIAM STEVENSON Christened on 26 OCT 1747 Saint Ninians, Stirling, Scotland
ALEXANDER STEVENSON Christened on 19 SEP 1749 Saint Ninians, Stirling, Scotland
ROBERT STIVENSON Christened on 05 MAY 1752 Saint Ninians, Stirling, Scotland **********
Cheers
DDJJAKE