Peter St John Catherine Vandersteen from London UK

I am in need of help with Researching the above family. I know they were married in London, they registered their children in The French Huguenot Church, threadneedle street, London UK. I also know Peter's son Peter St.John was given an aprenticeship In london in 1715 as a 15 year old.

I am stuck at Peter St. John Senior and his Wife Catherine Vandersteen. I beleive Peter's father was also a Peter but I am not sure, I am trying to find his parents, and Catherines Parents. This is the link I am stuck at - Peter was born abt C1668 as for it being in London I dont know.. But I could do with some help on finding the rest of the family..

I have traced up from my Mother.. and now have been stuck as to where to go from here. I believe they were Huguenots, especially Catherine, and I would love to further this research and find out if Peter Senior is UK or French?

If anyone could help me I would be so grateful.. Someone has to be searching the same family somewhere?

thank you
SJ