It is a noun, but it is a possessive noun. It functions as an adjective.
Yes it is. It is the name of one specific glacier.
The plural possessive form of "John's" is "Johns'".
Yes it is. It is the name of one specific glacier.
Val Johns's birth name is Valjean Johns.
Daniel Johns's birth name is Daniel Paul Johns.
Margo Johns's birth name is Jessie Margaret Johns.
Cort Johns's birth name is Cort Maclean Johns II.
Hugh Johns's birth name is Hugh Richard Lewis Johns.
Stratford Johns's birth name is Alan Edgar Stratford-Johns.
Johns Hopkins
Barbara Rose Johns died in 1991
most definetely she is johns offspring