Some masculine nouns (and one neuter noun, "Herz" referred to as "weak nouns" or "n-nouns", take an -n or -en in the dative singular and plural. Many are masculine nouns ending in -e in the nominative (such as "Name" [name, "Beamte" and "Junge" [boy), although not all such nouns follow this rule. Many also, whether or not they fall into the former category, refer to people, animals, professions, or titles; exceptions to this include the aforementioned "Herz" and "Name", as well as "Buchstabe" (letter), "Friede" (peace), "Obelisk" (obelisk), "Planet" (planet), and others.