His brother , William Matthews Merrick , was a federal judge and congressman from Maryland .
Born in Charles County , Maryland , Merrick was the son of William D. Merrick , a member of the Maryland legislature and the United States Senate .
Merrick 's brother , William Matthews Merrick , was a federal judge and congressman Maryland Maryland .
Born in Charles County , Maryland , Merrick was the son of William D. Merrick , a member of the Maryland legislature and the United States Senate .