If you obtain his marriage certificate, it will give his father's name & occupation. The 1851 census shows:
Name Relationship Mar Age Sex Occupation Birthplace
John
PESTER Head M 33 M Farm Labourer Exton-SOM
Ann
PESTER Wife M 27 F --- Instow-DEV
James
PESTER Son - 4 M --- Instow-DEV
Mary Ann
PESTER Daur - 1 F --- Instow-DEV
Joseph
Carter PESTER Son - 7 M --- Instow-DEV
Address: Bickleton, Barnstaple
Census Place: Instow Barnstaple,
Devonshire PRO Reference: HO/107/1893 Folio: 532 Page: 18 FHL Film: 0221044
with possible parents:
Name Relationship Mar Age Sex Occupation Birthplace
James
PESTER Head M 66 M Ag Lab ----SOM
Sarah
PESTER Wife M 61 F --- ----SOM
Mary A. PESTER Daur U 16 F --- Chittlehampton-DEV
John
BUCKINGHAM GSon - 7 M --- Swimbridge-DEV
Address: Knightacott, Barnstaple
Census Place: Fremington Barnstaple,
Devonshire PRO Reference: HO/107/1893 Folio: 510 Page: 16 FHL Film: 0221044
I did find a non-conformist baptism for a John
PESTER, son of James & Sarah:
Christening: 02 MAR 1826 Wesleyan, Barnstaple,
Devon, Born: 26 JAN 1818
Parents:
Father: JAMES
PESTER Mother: SARAH
A series of baptisms took place at the Wesleyan chapel:
1. HARRIOTT
PESTER - International Genealogical Index
Gender: Female Christening: 02 MAR 1826 Wesleyan, Barnstaple,
Devon,
England (born 19 Aug)
2. JOHN
PESTER - International Genealogical Index
Gender:
Male Christening: 02 MAR 1826 Wesleyan, Barnstaple,
Devon,
England 3. MARY ANN
PESTER - International Genealogical Index
Gender: Female Christening: 25 MAR 1835 Wesleyan, Barnstaple,
Devon,
England (born 24 Feb)
4. ELIZABETH
PESTER - International Genealogical Index
Gender: Female Christening: 12 SEP 1822 Wesleyan, Barnstaple,
Devon,
England (born 9 Aug)
5. ELIZTH. LACK
PESTER - International Genealogical Index
Gender: Female Christening: 28 SEP 1826 Wesleyan, Barnstaple,
Devon,
England (born 10 Sep)
6. JAMES
PESTER - International Genealogical Index
Gender:
Male Christening: 02 MAR 1826 Wesleyan, Barnstaple,
Devon,
England 