What is the name of this Cornwall parish?

[mosiefish]

It`s part of an enlistment document so perhaps the person produced his birth certificate as proof of age and place of birth.  Totally agree with with Per quin Libellor.

Mo

[youngtug]

It does read Perquin Libellor, maybe referring to a previous document as mentioned by snbny357 or as mosiefish says. He was 42years old at the time. There are no parishes in Cornwall, let alone Truro district that match,, in English or Cornish language form.

[Joburg]

Hi,
   Perranbuloe  parish in the 100 of Pyder,poor law union is Truro,and the reg dis.is Truro.

Regards

Joburg

[Bookbox]

Just for the record, it’s written Perquin Sibellor (not Libellor).

It is not Latin, and it does not mean ‘by that certificate’.

It appears to be an attempt to render the name of a Cornish parish that was unfamiliar to the writer. As has been suggested, Perranzabuloe is the most likely (not Perranbuloe).

[youngtug]

Looks like L to me, not an S.

[Bookbox]

Looks like L to me, not an S.

The clue is in the bottom of the letter. In this sort of italic hand, a capital L would normally have a final stroke or hook that leads forwards, not backwards as here.

[youngtug]

I think it is just a sloppy L. Apart from that, why the q and also the i, which is dotted.

[Bookbox]

I think it is just a sloppy L.

In my view, and from the small part that we can see here, the hand is not at all sloppy – it is well-formed and precise, with a clear distinction made between letters.

Apart from that, why the q and also the i, which is dotted.

I’m suggesting that the parish name is mis-spelt because the writer was unfamiliar with it. This is a military discharge paper, which may have been written up a very long way from Cornwall. The details would almost certainly have been copied from another document, possibly with a long copying-chain behind it, and there may have been mis-copying or mis-hearing anywhere along that chain.

[youngtug]

I agree the hand is neat and tidy but the L [or S] seems to be slightly unformed, it could be a personal trait of the writer maybe. The wording does seem,as previously mentioned to be displaced. Maybe more of the document, if shown, could help.
I must say, that although I had to write everything in copperplate at school up to the age of eleven, my writing is not a touch on this.