Hello: In my research of the origin of the name "Madill", I have found that it is rooted in Scottish origins, derived from the clan name MacDougal (listen to the Gaelic pronounciation of "MacDougal" and phonetically there is a likeness to "Madill" if you listen closely). There is even a tartan associated with the name Madill. Not sure if Medill is the same as Madill. A certain Joseph Medill (b.1823 in Canada, resided Cleveland, OH) was the famous republican, anti-immigrant editor of the Chicago Tribune slinging the Tribune's bold, anti-Irish sentiments during Chicago's boom in the 19th century. Is this the same Medill?? Anyway, there could be multiple origins of different Madill's and Medill's with varying origins. The Madill name even found its way to Australia. One Henry Madill fought in the American Civil war. There was a Madill casualty on the Titanic.