I have some information on the Maryland Dohme's I have not been able to place them with my Dohme family from Ohio. Most of mine were in Hamilton County, Darke County and Clarke County. I have found that some of my ancestors names were Dohme but as I go back there is a possibility that the name was Duhme. Hermann Duhme had a large vineyard in Delhi Twp Oh. His son Hermann also had one of the largest jewelry stores in Cincinnati.
As for the Maryland Dohme's Louis Dohme, I have his degrees from the college, was a pharmacist he started out as Sharp and Dohme but then in 1900's his company merged with Mercke. Louis Dohme was the President of Maryland College of Pharmacy from 1891-1896 and then later his brother was in 1899. And then from 1903-1904 Charles Dohme was president.
I couldnt find Samuel Dohm (e) in the information I have. I recently ordered copies from a book at the Library of Congress "The Dohme Family Tree" by Francis Dohme Cockey. It has some family trees in it going back to Germany in the 1600's if any of the families either Ohio or Maryland families are related I could give you what information I have. My grgrgrandfather Ferdinand Edward Dohme was born in 1827 in Germany his father I believe is Hermann Duhme.