Gilbert Forrest was born in Baltimore Co., MD 1781. His father was John Forrest and his mother was Rachael. Gilbert died 13 Oct 1867 in Marietta, Washington Co., OH. He worked as a farmer.
Hiram W. Forrest married Nancy Mccollam 1 Mar 1836 at Guernsey, OH.
Hiram and Nancy Forest were living in Washington Co., Grant, IN at the time of the 1850 US Census. Hiram was 33y, born OH, Nancy was 33 b. NJ. five of the children were born in OH, from Sarah 14y to Joseph 6y. Georg and Minerva were the youngest two, born in IN.
Possible connection, but not proof.