Petronella is the femail form of the name Peter and is a common name in the Netherlands.
Other pre-names names like Nicholai is Latin form of Nicholas and some church parish records used Latin Christian names for the records even though the named child was likely called by their English name (not the Latin one).
I came across this when following my family history across Warwickshire, Leictershire and Derbyshie. I noticed some people with my family name in Stapenhill, Derbyshire in mid 1600's had unusual Christian names like Ratam (Indian name), Gulieln, Roberti, Johis, Johannis. With the exception of Ratam, other names are Latin forms of William, Robert, John and Joseph.