Male pronunciation is more 'r' on phiuthar than the female pronouncing it. Is this regional?
What do you mean it "is more 'r'"? There are no dialectal differences in the pronunciation of the r in piuthar.
according to the gaelic - English dictionary sister is spelled piuthar and yet it is phiuthar that is used on here
The word "sister" by itself is different than speaking directly to "sister"