This is the 9427th most frequent German word.
metcalfe
The word "Metcalfe" is not a German word; it is typically a surname.
Here, 'Metcalfe' is used as a proper noun referring to a person's surname.
Johns Nachname ist Metcalfe.
John's last name is Metcalfe.
In this context, 'Metcalfe' is used as part of a proper noun identifying a specific individual, attributing an accomplishment to this person.
Der Wissenschaftler Metcalfe entwickelte ein wichtiges Gesetz.
The scientist Metcalfe developed an important law.
Here, 'Metcalfe' is used possessively to reference the ideas or theories associated with this individual.