Hi
A couple of baps that you may already have but the info in the registers helps to possibly link these to one of the burials:
8 Nov 1761 baptism of Edward son of Edward & Sarah Brown of Girslees Miln
19 Feb 1764 bap of Elizabeth dr of Edward & Sarah Brown of Girslee miln
27 May 1770 bap of Nicholas the son of Edward & Sarah Brown of Girslee miln, 3/4 year old
In the entry for the 1752 marriage of Edward Brown & Sarah Lowes, the only additional information was that they were both 'of this parish'. That does not necessarily mean they were born there.
A Nicholas Brown marries shortly before Edward - I could not find a bap in Elsdon for this elder Nicholas Brown either nor baps for any of his children. They could still be living/have been born in the area, but could be non-conformist. Edward & Sarah may have 'lapsed' to C of E or Sarah could have been C of E and have prevailed
This is all speculation however. Even if Edward & Nicholas senior are related, their family could have moved to the area after they had been baptised elsewhere, or they could both be mobile hinds or shepherds, moving around as adults every 12 months or so, with the crossing of paths in 1752 in Elsdon being co-incidence.
There is another burial:
12 Feb 1750 Nicholas Brown of Elsdon
Matilda
P.S. Sorry forgot to provide the Nicholas Brown marriage - 18 May 1752 Nicholas Brown & Mary Nicholson both of this parish
A couple more burials:
12 April 1744 buried Nic: son of Nicholas Brown of Elsdon
28 Oct 1744 Mabell Brown of Elsdon Widdow Pr [was buried]
The Nicholas Brown entries refer to a place of abode in Elsdon, which I would take to mean Elsdon township, while Edward Brown is said to live in Girslee
miln