Hogwarts School of Witchcraft and Wizardry is located in Great Britan - she doesn't give a specific place though.
Is he the one in blue
Dumbledore
The Potters
The possessive form for the plural noun potters is potters'.Example: We can find some nice pieces at the potters' gallery on Second Street.
He is neither dead nor alive in reality - Harry Potter is a ficticious person.
Potters Bar's population is 21,618.
The Potters Field was created in 2008.
Stoke Potters was created in 1929.
Potters For Peace was created in 1986.
Nowadays term 'alma mater' doesn't refer to a person, but a school, so it would be Hogwarts.
Harry Potter Places
Potters Bar railway station was created in 1850.