Hi
I have just located a baptismal record for a Jacob Buck on Ancestry who could be the father of Ann, Juliet Ann, Rebecca, Maria Ann & James.
The record shows that Jacob was christened in June 1754 at St Saviour's Church in Southwark, Surrey.
His parents are listed as James and Sarah, with James' occupation given as a Smith, the same as Jacob (when his son James was born in 1791 in the same parish)
Regards
Mark