Notes
1. As we shall see in the following chapter, both "der Buchstabe" and "der Name" belong to a separate subdivision of weak masculine nouns and behave differently in the genitive case.
2. You would only use "der Experte", "der Jude", "der Kollege", "der Kunde", "der Löwe", "der Sklave", and "der Zeuge" if you are speaking of male experts, Jews, colleagues etc. The female equivalents have their own separate German noun, all of which end in "-in" - "die Expertin (-innen)", "die Jüdin (-innen)", "die Kollegin (-innen)", "die Kundin (-innen)", "die Löwin (-innen)", "die Sklavin (-innen)" and "die Zeugin (-innen)".