Find the person who paid for the headstone and find out what (s)he knows
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"James was born about 1745. He passed away in 1815. He came to Newfoundland in. 1764 and settled at Petty Harbour. Because it was illegal to be Catholic in Newfoundland in 1779 he was married at the Anglican Cathedral in St. John’s. When the census was taken in 1794 James was living at Petty Harbour and stated that he had been living in Newfoundland for 30 years. The family was Catholic and James was engaged in the fishery. "
found at:
https://www.wikitree.com/wiki/Howlett-826No source given, but if they are right, then you at least know his religion.
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No specific help in any of the rest of this, but interesting background if you are just getting started:
https://www.irishtimes.com/news/where-s-that-1.1103887Howlett Quite numerous: South East, Limerick etc. Ir. Húiléid. Anglo-Normans who settled in Leinster, now mainly Wexford. A double diminutive of Hugh. SI.
https://www.johngrenham.com/findasurname.php?surname=Howlett---------
percentages might favor SW Wexford
http://nlirishconnections.org/wp-content/uploads/2012/11/TRACING-THE-IRISH.pdf----
more background
"n fact, according to Mannion, over ninety per cent of Newfoundland's Irish came from an area within forty miles of Waterford City (1971:6) It is interesting to note that Virginia Dillon arrived independently at similar findings in her research on the "Southern Shore" of the Avalon Peninsula. After: surveying some of the existing graveyards along "the Shore," she concluded that "all these Irish origins are on the rivers served by New Ross in County Wexford and Waterford" (1968:54) "
found at:
http://sites.rootsweb.com/~cannf/links_irish.htm---------
You might have all that, but I'll post it just in case. And I learned something
.