Did Mary have twin sisters called Ann and Jane baptised in 1760? Father William is also stated as being of Ludlow, a husbandman.
I cannot at the moment find any baptism for a William Coppock in Ludlow. I can find a likely Knutsford one and even two possible marriages in the Knutsford area. Nothing for Ludlow at all.
The distance between Knutsford and Ludlow is 92 miles, so not exactly round the corner!
Could the minister have misheard what William said and interpreted it as Ludlow? Difficult to know what to think here.