I'm tracking down some OLIVERS.
I discovered by accident that 'Auld Jock' OLIVER may well have had a half sibling.
Birth was on the IGI so I found his BC in 1859 :
Thomas OLIVER, mother- Ann OLIVER, no father
I couldn't scare up a marriage anywhere so tried deaths with birth year around 1860 - 2 Thomas OLIVER results.
1st was his Cousin Thomas O son of Thomas O died single in 1884
2nd - a Thomas BAIRD
Thomas BAIRD [ reputed father] and Ann OLIVER both deceased
and wife Janet RICHARDSON.
I rechecked my searching;
Death, 1915, Linlithgow, West Lothian, birth year 1859
Thomas BAIRD =1 result
Thomas OLIVER = 1 result
Thomas OLIVER other surname BAIRD = 0 RESULTS
Thomas BAIRD other surname OLIVER = 0 RESULTS
So why would he be indexed under the birth name, that isn't used on the certificate AND under the surname he obviously used
but NOT cross indexed under both?
Did the registrar realise that he was 'officially' OLIVER and use that as well as the stated BAIRD or what ?
I'm a bit hazy on this [ though I'm sure it's come up before]