Re: The oddness of Gaelic words in p-

> Welsh [w] is /u/, right?
> I can see why you write *uiros, not *wiros.

It's just a matter of preference - others write it as *wiros (it's a
force of habit for me to spell Gallo-Brittonic words the way that
ancient native speakers did when using the Latin alphabet).

> So, instead of 'sinner', it was 'sin-man' ?

Not really, because in later compound words such as this, gwr "man" is
treated merely as a suffix (likely under the influence of Latin -or
[ius]).

- Chris Gwinn