Wikia

Ogg was the gamekeeper at Hogwarts School of Witchcraft and Wizardry during Arthur Weasley and Molly Prewett's time at the school. He may have had Rubeus Hagrid, the Keeper of Keys and Grounds, as his assistant, as he later replaced him. In 1995, Molly, now married to Arthur, reminisced a great deal about Ogg after seeing the intriguing Whomping Willow.

Behind the scenes

Molly Weasley mentions that Ogg was the gamekeeper, but it is thought that Rubeus Hagrid was his assistant at the time and was possibly the next gamekeeper. It is unknown what really happened, as when Molly attended Hogwarts, the time line dictates that Hagrid would have already been expelled a few decades before and presumably already have been allowed to stay on as gamekeeper himself.

Hogwarts Faculty

Founders	Godric Gryffindor \| Helga Hufflepuff \| Rowena Ravenclaw \| Salazar Slytherin
Headteachers	Eupraxia Mole \| Vulpus \| Phyllida Spore \| Dexter Fortescue \| Eoessa Sakndenberg \| Ambrose Swott \| Everard \| Vindictus Veridian \| Dilys Derwent \| Quintin Trimble \| Limebert \| Phineas Nigellus Black \| Walter Aragon \| Basil Fronsac \| Newton Scamander \| Armando Dippet \| Albus Dumbledore \| Dolores Umbridge \| Severus Snape \| Minerva McGonagall
Deputy Heads	Minerva McGonagall \| Amycus Carrow \| Alecto Carrow
Heads of House	Filius Flitwick \| Minerva McGonagall \| Horace Slughorn \| Severus Snape \| Pomona Sprout
Teaching Staff	Bathsheda Babbling \| Herbert Beery \| Cuthbert Binns \| Charity Burbage \| Alecto Carrow \| Amycus Carrow \| Albus Dumbledore \| Firenze \| Filius Flitwick \| Rubeus Hagrid \| Rolanda Hooch \| Silvanus Kettleburn \| Gilderoy Lockhart \| Neville Longbottom \| Remus Lupin \| Minerva McGonagall \| Galatea Merrythought \| Quirinus Quirrell \| Aurora Sinistra \| Horace Slughorn \| Severus Snape \| Pomona Sprout \| Sybill Trelawney \| Septima Vector \| Unidentified witch
Support Staff	Rancorous Carpe \| Dobby \| Argus Filch \| Wilhelmina Grubbly-Plank \| Rubeus Hagrid \| Rolanda Hooch \| Hankerton Humble \| Kreacher \| Ogg \| Irma Pince \| Poppy Pomfrey \| Apollyon Pringle \| Lucinda Thomsonicle-Pocus \| Winky