I am just beginning to delve into the McMahons...so this is the little I know. A Margaret McMahon or she seemed to have been called Maggie, was married to James Colopy sometime before about 1885...probably in the area of Danville...their oldest child was my grandfather, Charles, although in the records someone has sent me his name is Paul..but it is my grandfather....That is about as much as I know. Cheryl Quinn