I am looking for the descendants of Elmer Onderdonk born August 1899 in Brooklyn, NY. His parents were George Onderdonk and Ida Merritt Ross. He had a sister named Elsie and a brother named Gilbert. His wife was named Marie b. around 1909. They married in 1929 and lived in Ridgewood, Queens. His brother Gilbert Onderdonk might have moved to Texas.
Any help, would be appreciated.