Jóhann is a masculine given name.
It is the Icelandic and Faroese form of the name Johann, a form of the Germanic and Latin given name "Johannes".
The English-language form is John.
The Icelandic surname Jóhannsson is a patronymic surname meaning son of Jóhann.
Jóhannsdóttir is a patronymic surname meaning daughter of Jóhann.