Stephan, I have been searching for Grogers.Am glad to have finally found one.My ancestor is Richard Groger b: 17 Mar 1773 Dublin City, Nova Scotia.He m: Hannah Brand of Westerly RI. My information has them marrying 4 Jul 1795 Hopkinton RI.
Richard's siblings were: Joseph, William (died young), Mary, Jane and Elsa. Joseph apparently was a farmer in Dublin City.
Anything here that might be a connection to yours?