 His eldest brother was Elbridge T. Gerry, Sr. and his younger twin brothers were Henry Averell Gerry and Edward Harriman Gerry.Robert's father, a successful real estate developer, died at the family's estate, Aknusti, at the age of 81 on October 31, 1957, just a few hours after his brother, former U. S. Senator Peter Goelet Gerry, died in Providence, Rhode Island.Robert L. Gerry, Jr. was the nephew of U.S.