I'm looking for information on my husband's family. His grandfather was Frank Arthur Gibson Jr. b. 19 Jun 1909 in Plainfield, NJ. He died 18 Feb 1985 in California. He was married to Augusta Geshwin born in France. His mother's name was Margaret Zugbaum. I know he changed his last name to Gibbon sometime after 1920, not sure when. Any help would be greatly appreciated.