Name:    Peter Holt
Baptism Date:    28 Apr 1723
Parish:    Bolton-le-Moors, Lancashire, England
Father's name:    Richard Holt
Mother's name:    Ellen Holt
Register Type:    Bishops Transcripts
Reference Number:    Drm/2/17b
Fathers Occupation: Weaver of G.B.

Marriage records:
Peter Holt of G.B. & Eliz. Howorth of Lostock

Only Elizabeth Howarth of Deane 1722 +/- 5 yrs
Name    Elizabeth Howarth
Gender    Female
Baptism Date    21 Oct 1722
Baptism Place    Deane By Bolton,Lancashire,England
Father    Jacobi Howarth
FHL Film Number    844816
Text:   "Elizabeta filih Jacobi Howarth de Rumworth"

Name    Elizabeth Howorth
Baptism Date    21 Oct 1722
Parish    Deane, Lancashire, England
4714
Father's Name    James Howorth
Register Type    Bishops Transcripts
Reference Number    Drm/2/68
Elizabeth ye daughter of James Howorth of Rumworth, Collier

It appears Elizabeth's father may be Jacob or James, as the two records (with matching dates) clearly differ.  The Bishops Transcript, which is normally the copy includes "Collier" so must be the original.

or

Name    Elisabeth Howorth
Residence Place    Deane, Lancashire, England
Gender    Female
Christening Date    19 Oct 1725
Christening Date (Original)    19 Oct 1725
Christening Place    Deane, Lancashire, England
Father's Name    Adam Howorth

Adam is more likely, as the first child is named Adam.

The following index record, is actually a burial on 24 Aug 1750 (see death notes)

Name:    Adam Hoult
Baptism Date:    24 Aug 1751
Parish:    Deane, Lancashire, England
Father's name:    Peter Hoult
Register Type:    Bishops Transcripts (Image 9 of 1750-1759 film)
Reference Number:    Drm/2/68
Text:   "Adam son of Peter Holt of Great Bolton"

Adam appears in the Bishops Transcripts, and is listed under a section titled "Salutis Nostrae".  It is not clear if this is a baptism  or burial.  There is also an index entry for Adam Hoult burial 24 Aug 1750 in the Dean St Mary Register (book).  It appears that both records refer to a burial in 1750.

The Bishops Transcripts is difficult to follow, with years missing from most pages, and list of records for birth, marriages and burials all on the same page.  Its easy to get the wrong year indexed!

Name    Adam Hoult
Event Type    Burial
Burial Date    24 Aug 1750
Parish    Deane, St Mary
Father's Name    Peter Hoult
Reference Number    GB127.L85/1/1/2

Name:    Margt Holt
Event Type:    Baptism
Age:    0
Birth Date:    16 Feb 1750
Baptism Date:    16 Apr 1750
Parish:    Bury, St Mary the Virgin
Parish as it Appears:    Bury St Mary Parish Church
Father's name:    Peter Holt
Reference Number:    L215
Item Number:    6
Archive Roll:    669
Abode:    Bell

Name:    Ellen Hoult
Event Type:    Burial
Burial Date:    22 Jul 1751
Parish:    Deane, St Mary
Parish as it Appears:    Deane
Father's name:    Peter Hoult
Reference Number:    GB127.L85/1/1/2 (page 65 on 1668-1784 film)

Name:    John Holt
Event Type:    Baptism
Baptism Date:    28 Aug (correction July) 1752
Parish:    Bolton le Moors, St Peter
Parish as it Appears:    Bolton St Peter Parish Church
Father's name:    Peter Holt
Mother's name:    Bettey Holt
Reference Number:    L243/1/1/3
Item Number:    2
Archive Roll:    853
Abode: Great Leaver

Born about 1756 if burial is correct.

Was married in 1779, so probably born before 1761 (if aged 18 or older when married).

Betty Holte from Harwood, bap. 1752 is too early, as would be 10y younger than William, and too old to have son Holt Mather.

Name:    Betty Hoult
Gender:    Female
Baptism Date:    16 May 1759
Baptism Place:    Deane By Bolton,Lancashire,England
Father:    Peter Hoult
FHL Film Number:    844816
Abode: Great Bolton

This burial is probably correct, as Betty is thought to be younger, closer age to William, and of child bearing age (maybe) when Holt Mather born in 1804.
Name:    Betty Mather
Birth Year:    abt 1756
Death Age:    81
Burial Date:    10 May 1837
Burial Parish:    Turton, Lancashire, England
Register Type:    Bishop's Transcript
Reference Number:    Drm/2/40

Not possibe (as Betty was alive) and is a Turton Burial:
25 July 1774: Betty Mather of Turton Widow

Betty Mather (nee Edge) is another, alive aged 82 in 1841 and died in 1842.

There is also a Betty Mather died Western Bolton in 1840, aged 71, but this Betty is about 10y too yourg.

Name:    Ellen Holt
Gender:    Female
Baptism Date:    17 Jan 1761
Baptism Place:    Deane By Bolton,Lancashire,England
Father:    Peter Holt
FHL Film Number:    844816