It's because of the old-time Maryland accent, which has to be heard to be believed. It's almost impossible to write in our alphabet; but here are some approximations:
Maryland = Merlin
County = Cowny (sometimes written Canny)
House = Hayuce
Files = falls
Out = ayoud
Moon = mewn
Ground = graynd
Down = dayn
Store = stewr
Bel Air = Blair
Montgomery = Mgummy (which has become tricked up to become Monkey)
PS
ironing = arnin (You can hear an example of this in John Travolta’s performance of Edna Turnblad in the 2007 movie Hairspray)
Thanks, that’s great.