He was the author of hundreds of generic and specific names in a multitude of families and also the author of American Spiders, as well as editor of a later revised printing of John Henry Comstock's Spider Book. During his tenure as Curator of Arachnids at the American Museum of Natural History he was the usual authority quoted when any question on spiders arose.
Bruce Willis | Willis Tower | Jeanne Willis | Winston E. Willis | Gordon Willis | Deborah Willis | Bob Willis | Thomas Willis | Nathaniel Parker Willis | Larry Willis | Dave Willis | Willis Jackson | Willis Hall | Willis Carto | Willis | Nick Willis | Henry Willis | Hank Willis Thomas | Circle of Willis | Chuck Willis | Allee Willis | Willis, Texas | Willis Sharpe Kilmer | Willis Jackson (saxophonist) | Willis Jackson, Baron Jackson of Burnley | Willis Harman | Willis Carto's | Willis Barnstone | Thomas Willis Fleming | Ted Willis, Baron Willis |
Agelenopsis actuosa (Gertsch & Ivie, 1936) (USA, Canada) – Common American Funnel-web Spider or Canadian Funnel-web Spider
John G. Gertsch went to high school in Sheffield Area Middle/Senior High School (SAMSHS) in Sheffield, Pennsylvania.
He was not a candidate for renomination in 1900 to the Fifty-seventh Congress.