die Nennung
mention
The saying or writing down of a name or term; a mention.
Die bloße Nennung seines Namens sorgte für Aufregung im Saal.
The mere mention of his name caused excitement in the hall.

mention / entry
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mention
The saying or writing down of a name or term; a mention.
Die bloße Nennung seines Namens sorgte für Aufregung im Saal.
The mere mention of his name caused excitement in the hall.

'Die Nennung' (the mention / entry) is a noun derived from the verb 'nennen' (to name, to mention). The ending '-ung' often turns verbs into feminine nouns that describe an action or a result.
Der Zeuge konnte den Täter nennen.
The witness was able to name the perpetrator.
In the meaning 'Erwähnung' (mention), 'Nennung' (mention) is often used with the genitive or the preposition 'von' (of). Typical phrases are 'die Nennung des Namens' (the mention of the name), 'unter Nennung von Gründen' (stating reasons), or 'ohne Nennung von Details' (without mentioning details).
Er bat um die Nennung aller Beteiligten.
He asked for the mention of everyone involved.
You can recognize this meaning from the context. When it is about sports, competitions, tournaments, or races, 'Nennung' (entry) means the official registration to participate.
Die Nennung für das Reitturnier muss bis Freitag erfolgen.
The entry for the riding tournament must be submitted by Friday.
information / boasting
'Angabe' and 'Nennung' both have to do with passing on information. An 'Angabe' can mean many kinds of information, for example a number, an address, or a statement. A 'Nennung' is narrower: it means that a name, term, or person is explicitly mentioned. Learners may confuse the words because a mention is also a kind of information. When it is generally about data or details, 'Angabe' fits better. When the important point is that a specific name or term is mentioned, 'Nennung' is more precise.

Die Nennung seines Namens im Bericht hat ihn überrascht.
The mention of his name in the report surprised him.
Die Lehrerin kontrolliert die Angaben auf dem Anmeldeformular.
The teacher checks the information on the registration form.