This is the 6719th most frequent German word.
estermann
"Estermann" is not a standard German word; it appears to be a surname.
Here, 'Estermann' is used as a proper noun to represent a family name.
Estermann ist mein Nachname.
Estermann is my last name.
'Estermann' is used as a proper noun representing the name of a company.
Die Firma Estermann stellt hochwertige Produkte her.
The Estermann company produces high-quality products.
In this sentence, 'Estermann' refers to a person's last name as a form of address.