Have a "Dumbell" in your family? (and I mean the surname ) Join the "Dumbell One Name Study"! Variants of the name include: Dumberell, Dumbrill...
I've traced the name back to George William Dumbell (I'm 10 degree's from him) who was born in 1832 Isle of Man, England.
I've found the surname "Dumbell" in Texas, New York, California, Connecticut, Florida, Tennessee, North Carolina and Massachusetts.