The very first instance of the name Brown appeared on page 8, not on page 12 as the index would have us believe. (NB. The numbers that appear in the top left hand corner of the following and subsequent examples are record entry references, not page numbers.)
How is this information of use to the researcher? If a name regularly appears as a witness to a baptism or marriage, it may indicate that they are an employer, or a person of some standing within the community. It may also imply that a familial relationship exists but is not immediately obvious due to the names of the couple. In the case illustrated above the bride Catherine Jolly is cited as a widow. Is it possible then that her maiden name was Brown? Whilst I have not followed this case through, it certainly opens up other avenues for potential investigation.
Of course the search is not limited to names of people it can be equally useful when applied to places. This is particularly relevant in a parish such as Norham, which sits not only on the boundary of a County, but also of a Country. The parish church of Ladykirk is less than a mile away on the opposite bank of the River Tweed. It lies in the County of Berwickshire, which is part of Scotland.
Using the same set of marriage records a simple search with "Ladykirk" as the search term produces some results which may surprise you:-
Furthermore by applying the rule that a marriage usually occurred in the parish of the Bride could have also led to this following marriage record potentially being missed:-