Hi
I have used a transcript of the Brinkworth baptisms which also show an entry (possibly for John's baptism) as follows:
Hathrill John 19 Feb 1769 s Benjamin & Judeth
The spelling is always a problem and this transcript shows lots of Hathrills and variants Hatharill, Hatheral, Hatheril, Hathriel, Hathril
I only have two children for James Hathrill & Lucy Heavens being
John Hathrill, born 1827, died 1855
James Hathrill, born 1828, died 1865
James married Eliza Hill, and I am researching their daughter Sarah born 16-05-1850
Regards
CW