The ISETT FAMILY of Maryland

I am searching for the rest of the William Henry Isett family. He was born in 1838 and died Dec. 7, 1913. I understand that we branched out from the Isett's that are located in Pennsylvania. He was married to a "Sara", they had 4 daughters and 1 son. Their son was William Edward Isett, who was my Grandfather. I also know that they came over from England and they made Hats, "Hattiers". If anyone has any further facts, please respond.