The substitution of Middle English -o- for Old English -u- before -m-, -n-, or -r- was a scribal habit before minims to avoid misreading the letters in the old style handwriting, which jammed letters. The practice similarly transformed some, monk, tongue, worm.
Bellbrook is a city in Greene County, Ohio, United States. The population was 6,943 at the 2010 census. It is part of the Dayton Metropolitan Statistical Area.
Willowbrook, Will County, Illinois. For the village in DuPage County, see Willowbrook, DuPage County, Illinois. Willowbrook is an unincorporated census-designated place in Will County, Illinois, United States. The population was 2,076 at the 2010 census. Geography.