Why is it der Guido?

Guido ends in -o, but that ending doesn’t settle the article: in a German dictionary, 45% of -o nouns take das, 43% take der, and 11% take die. So learn it with its article: der Guido.

Which endings you can rely on
Sense 1
der

Meaning

[1] male first name

[1] männlicher Vorname

Examples

[1] Guido is now going with Melanie

[1] Guido geht jetzt mit Melanie.

Declension

1 Singular Plural
Nominativ der Guido die Guidos
Genitiv des Guidos der Guidos
Dativ dem Guido den Guidos
Akkusativ den Guido die Guidos

Pronunciation

Dictionary entries include material from Wiktionary. Wiktionary