Might as well put my feelers out for this one too-sold off all my low whistles in favor of the flute, and now I’m rediscovering them! Oh well, it happens!
Thank you!
Maurice Reviol was Cillian’s Whistle maker while he worked in Cillian’s shop. Maurice met and married a nice gal from New Zealand.
After a while, the young lady got the itch to return to her homeland. Maurice decided to go along (funny how that works).
Cillian told Maurice to go ahead and take the whistle business with him as Cillian’s Uilleann Pipe waiting list was getting fairly unwieldy and he didn’t want to fiddle around making whistles for fear of lynch mobs of angry pipers (you really don’t want to mess with angry pipers).
So, to make a long story short, Reviol whistles are O’Brien Whistles with Reviol’s name on them instead of O’Brien’s. Or, they’re Reviol whistles with Reviol’s name on them instead of O’Brien’s or something like that…anyway. You get the picture. 
Doc
Sehr interessant! Oops, thought I was on the German forum! Well done, Doc, I mean, oh, what’s that Irish saying…?