Unfortunately, there are gaps in the Nicholas Juer information from his possible birth in 1673 and the following few generations. The work that I have viewed on this was done by Randolph Jewer from Botwood. Randolph is now deceased, although I do have a paper copy of his work. The most accurate information concerning the first Juer/Jewer's of Newfoundland are found in the church records of the Carbonear/Harbour Grace/Spaniard's Bay area. I recommend a week-long visit to the archives at "The Rooms" in St. John's to review original copies of those records. I only had one day and could not do a thorough documentation and connection of all the family names. Someone needs to do a crucial analysis of all Juer births, marriages, and deaths in that area for the period between mid 1700's through late 1800's. If this has already been done, I'd love to see the data.
Given that Nicholas Juer may have been the first Juer in Newfoundland, it is clear that he was a part of the English Colony at Carbonear. This made him an English settler and of the Anglican faith. He likely travelled from Bristol, England, the primary sea port at the time with Newfoundland as a destination. Hopeful information would be in ship manifesto's or birth and other records in England. This has yet to be seriously researched by someone. Both variants of Juer and Jewer exist in England today. If any research on those names have already been done in Great Britain, then information regarding the origins of the family name etc. would exist. Unfortunately, "googling" has not been fruitful in discovering such research. Perhaps there are contacts through geneological societies that could provide clarification on this. Again, I have not yet tried to hunt this down.
Hopefully we'll eventually get to this information.