Hello my name is... translates as:
Hallo, ich heiße...
or, less commonly
Hallo, mein Name ist ....
Name
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.
The name in german is "Google Übersetzter".
Thomas is pronounced Tormass in German.
Riley is not a German name and has no German equivalent. It is spelled and pronounced the same in German.