The name "Oliver" is the same in German as it is in English. It is pronounced similarly, with a slight emphasis on the first syllable. In some contexts, you might also find the name written as "Olaf," but this is a different name altogether.
Nama saya Oliver.
Oliver Kahn
Name
mon nom est monsieur Oliver, je m'appelle monsieur Oliver
because its a name you say it the same in German
Sein name
Name = Name
Köln is how you say Cologne in German.
As this is a name it remains the same in German.
Caitlin. There is no German translation for this name.
ihr Name ist....
Allie is just Allie in German; there is no German translation.